<?xml version="1.0" encoding="UTF-8"?>
<otrunk id="dd0124c0-b5d7-11df-8d81-0800200c9a66">
  <imports>
    <import class="org.concord.data.state.OTDataChannelDescription" />
    <import class="org.concord.data.state.OTDataStore" />
    <import class="org.concord.data.state.OTDataTable" />
    <import class="org.concord.framework.otrunk.view.OTFrame" />
    <import class="org.concord.framework.otrunk.wrapper.OTObjectSet" />
    <import class="org.concord.otrunk.OTSystem" />
    <import class="org.concord.otrunk.ui.OTText" />
    <import class="org.concord.otrunk.ui.OTLayerContainer" />
    <import class="org.concord.otrunk.ui.OTTextPane" />
    <import class="org.concord.otrunk.ui.OTPlacementContainer" />
    <import class="org.concord.otrunk.ui.OTPlacement" />
    <import class="org.concord.otrunk.ui.OTChoice" />
    <import class="org.concord.otrunk.ui.OTChoiceMultiple" />
    <import class="org.concord.otrunk.ui.question.OTQuestion" />
    <import class="org.concord.otrunk.ui.OTImage" />
    <import class="org.concord.otrunk.ui.OTButton" />
    <import class="org.concord.otrunk.ui.OTLayerContainer" />
    <import class="org.concord.otrunk.ui.swing.OTChoiceViewConfig" />
    <import class="org.concord.otrunk.view.document.OTDocumentViewConfig" />
    <import class="org.concord.otrunk.view.OTViewEntry" />
    <import class="org.concord.otrunk.view.OTViewBundle" />
    <import class="org.concord.otrunk.view.document.OTCompoundDoc" />
    <import class="org.concord.otrunk.view.document.OTTextObject" />
    <import class="org.concord.otrunk.script.OTScriptEngineBundle" />
    <import class="org.concord.otrunk.script.OTScriptEngineEntry" />
    <import class="org.concord.otrunk.script.ui.OTScriptObject" />
    <import class="org.concord.otrunk.script.ui.OTScriptVariable" />
    <import class="org.concord.otrunk.script.js.OTJavascript" />
    <import class="org.concord.otrunkmw.OTModelerPage" />
    <import class="org.concord.otrunk.user.OTWorkgroupMemberChooser" />
  </imports>
  <objects>
    <OTSystem>
      <bundles>
        <OTViewBundle showLeftPanel="false">
          <views>
            <OTViewEntry objectClass="org.concord.otrunk.user.OTWorkgroupMemberChooser" viewClass="org.concord.otrunk.ui.swing.OTWorkgroupMemberChooserView" />
            <OTViewEntry objectClass="org.concord.data.state.OTDataTable" viewClass="org.concord.data.state.OTDataTableView" />
            <OTViewEntry objectClass="org.concord.otrunk.view.document.OTDocument" viewClass="org.concord.otrunk.view.document.OTDocumentView" />
            <OTChoiceViewConfig objectClass="org.concord.otrunk.ui.OTChoice" viewClass="org.concord.otrunk.ui.swing.OTChoiceCheckBoxView" useViewsAsChoices="true" />
            <OTViewEntry objectClass="org.concord.otrunk.ui.OTLayerContainer" viewClass="org.concord.otrunk.ui.swing.OTLayerContainerView" />
            <OTViewEntry objectClass="org.concord.otrunk.ui.OTButton" viewClass="org.concord.otrunk.ui.swing.OTButtonView" />
            <OTViewEntry objectClass="org.concord.otrunk.script.ui.OTScriptObject" viewClass="org.concord.otrunk.script.ui.OTScriptObjectView" />
            <OTViewEntry objectClass="org.concord.otrunkmw.OTModelerPage" viewClass="org.concord.otrunkmw.OTModelerPageView" />
          </views>
          <frame>
            <OTFrame width="800" height="600" />
          </frame>
        </OTViewBundle>
        <OTScriptEngineBundle>
          <engines>
            <OTScriptEngineEntry objectClass="org.concord.otrunk.script.js.OTJavascript" engineClass="org.concord.otrunk.script.js.OTJavascriptEngine" />
          </engines>
        </OTScriptEngineBundle>
      </bundles>
      <root>
        <OTLayerContainer>
          <layers>
            <OTModelerPage local_id="mwpage" authoredDataURL="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v3_post/page1.cml">
              <variables />
              <questions>
                <OTQuestion id="00ea431f-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_Class">
                  <prompt>
                    <OTText id="00ec3ef0-b5d8-11df-b7e0-e7f9adce28b0" text="Please check ALL classes in which you have previously done SAM or RI-ITEST activities." />
                  </prompt>
                  <input>
                    <OTChoice id="00ed2951-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="1">
                      <choices>
                        <OTText id="00ff51c2-b5d8-11df-b7e0-e7f9adce28b0" text="Physics" />
                        <OTText id="00ff51c3-b5d8-11df-b7e0-e7f9adce28b0" text="Chemistry" />
                        <OTText id="00ff51c4-b5d8-11df-b7e0-e7f9adce28b0" text="Biology" />
                        <OTText id="00ff78d5-b5d8-11df-b7e0-e7f9adce28b0" text="Other" />
                        <OTText id="00ff78d6-b5d8-11df-b7e0-e7f9adce28b0" text="I have not done these activities in previous classes." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <OTObjectSet>
                      <objects>
                        <object refid="00ff51c2-b5d8-11df-b7e0-e7f9adce28b0" />
                        <object refid="00ff51c3-b5d8-11df-b7e0-e7f9adce28b0" />
                        <object refid="00ff51c4-b5d8-11df-b7e0-e7f9adce28b0" />
                        <object refid="00ff78d5-b5d8-11df-b7e0-e7f9adce28b0" />
                        <object refid="00ff78d6-b5d8-11df-b7e0-e7f9adce28b0" />
                      </objects>
                    </OTObjectSet>
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="01003c28-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_Other">
                  <prompt>
                    <OTText id="01003c29-b5d8-11df-b7e0-e7f9adce28b0" text="If you checked &quot;Other&quot; in the previous question, please type the name of the courses in which you previously have done SAM or RI-ITEST activities. Otherwise, skip this question." />
                  </prompt>
                  <input>
                    <OTText id="01003c2a-b5d8-11df-b7e0-e7f9adce28b0" text="" />
                  </input>
                </OTQuestion>
                <OTQuestion id="0100633c-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_1">
                  <prompt>
                    <OTText id="0100633d-b5d8-11df-b7e0-e7f9adce28b0" text="1. What are computer models used for?" />
                  </prompt>
                  <input>
                    <OTChoice id="0100633e-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="01008a4f-b5d8-11df-b7e0-e7f9adce28b0" text="making predictions" />
                        <OTText id="01008a50-b5d8-11df-b7e0-e7f9adce28b0" text="testing theories" />
                        <OTText id="01008a51-b5d8-11df-b7e0-e7f9adce28b0" text="designing things" />
                        <OTText id="01008a52-b5d8-11df-b7e0-e7f9adce28b0" text="making predictions AND testing theories" />
                        <OTText id="01008a53-b5d8-11df-b7e0-e7f9adce28b0" text="all of the above" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="01008a53-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0100ff84-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_2">
                  <prompt>
                    <OTText id="0100ff85-b5d8-11df-b7e0-e7f9adce28b0" text="2. What is true of the best computer models?" />
                  </prompt>
                  <input>
                    <OTChoice id="0100ff86-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="01012697-b5d8-11df-b7e0-e7f9adce28b0" text="They are a completely accurate reproduction of what they are modeling." />
                        <OTText id="01012698-b5d8-11df-b7e0-e7f9adce28b0" text="They are a completely accurate reproduction of what they are modeling, except they are scaled differently (smaller or bigger than the real thing)." />
                        <OTText id="01012699-b5d8-11df-b7e0-e7f9adce28b0" text="They may not be a completely accurate reproduction of what they are modeling, but they produce reasonably good results that come close to matching reality." />
                        <OTText id="0101269a-b5d8-11df-b7e0-e7f9adce28b0" text="They may not be a completely accurate reproduction of what they are modeling, but they look exactly like what they are modeling." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="01012699-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="01014dab-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_3">
                  <prompt>
                    <OTText id="01014dac-b5d8-11df-b7e0-e7f9adce28b0" text="3. In which case does it make sense to use a computer model?" />
                  </prompt>
                  <input>
                    <OTChoice id="01014dad-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="01014dae-b5d8-11df-b7e0-e7f9adce28b0" text="to conduct an experiment that would be too expensive to do in real life" />
                        <OTText id="010174bf-b5d8-11df-b7e0-e7f9adce28b0" text="to conduct an experiment that would be too dangerous to do in real life" />
                        <OTText id="010174c0-b5d8-11df-b7e0-e7f9adce28b0" text="to conduct an experiment that would take too long to do in real life" />
                        <OTText id="010174c1-b5d8-11df-b7e0-e7f9adce28b0" text="all of the above" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="010174c1-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="01019ad2-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_4">
                  <prompt>
                    <OTText id="01019ad3-b5d8-11df-b7e0-e7f9adce28b0" text="4. What is the most likely reason the results from a model may NOT perfectly match reality?" />
                  </prompt>
                  <input>
                    <OTChoice id="01019ad4-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="01019ad5-b5d8-11df-b7e0-e7f9adce28b0" text="All the factors that might affect the model were not considered." />
                        <OTText id="0101c1e6-b5d8-11df-b7e0-e7f9adce28b0" text="The user set the controls or initial parameters so that the starting conditions for the model were unrealistic." />
                        <OTText id="0101c1e7-b5d8-11df-b7e0-e7f9adce28b0" text="The user didn't interpret the results properly." />
                        <OTText id="0101e8f8-b5d8-11df-b7e0-e7f9adce28b0" text="There was a problem with the computer processor." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="01019ad5-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="01021009-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_5">
                  <prompt>
                    <OTText id="0102100a-b5d8-11df-b7e0-e7f9adce28b0" text="5. A liquid CANNOT be squeezed into a significantly smaller volume. This is because molecules in a liquid" />
                  </prompt>
                  <input>
                    <OTChoice id="0102100b-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0102100c-b5d8-11df-b7e0-e7f9adce28b0" text="move too fast to be compressed into a smaller volume" />
                        <OTText id="0102100d-b5d8-11df-b7e0-e7f9adce28b0" text="are bigger than gas molecules" />
                        <OTText id="0102371e-b5d8-11df-b7e0-e7f9adce28b0" text="have very little space between them" />
                        <OTText id="0102371f-b5d8-11df-b7e0-e7f9adce28b0" text="flow freely through their container" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0102371e-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="01025e30-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_6">
                  <prompt>
                    <OTText id="01025e31-b5d8-11df-b7e0-e7f9adce28b0" text="6. What happens as water boils?" />
                  </prompt>
                  <input>
                    <OTChoice id="01025e32-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="01025e33-b5d8-11df-b7e0-e7f9adce28b0" text="The water molecules overcome their attractions for each other." />
                        <OTText id="01025e34-b5d8-11df-b7e0-e7f9adce28b0" text="The covalent bonds between the hydrogen and oxygen atoms that make up the water molecules are broken." />
                        <OTText id="01025e35-b5d8-11df-b7e0-e7f9adce28b0" text="The attractions between the water molecules are weakened." />
                        <OTText id="01025e36-b5d8-11df-b7e0-e7f9adce28b0" text="The hydrogen and oxygen atoms that make up the water molecules are destroyed." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="01025e33-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="081bfeb7-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_7">
                  <prompt>
                    <OTText id="081c25c8-b5d8-11df-b7e0-e7f9adce28b0" text="7. Heating a solid eventually causes melting. This is because heating a solid" />
                  </prompt>
                  <input>
                    <OTChoice id="081c25c9-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="081c25ca-b5d8-11df-b7e0-e7f9adce28b0" text="gives the atoms more kinetic energy, so they can overcome some of their attractions" />
                        <OTText id="081c25cb-b5d8-11df-b7e0-e7f9adce28b0" text="loosens the material between the atoms, allowing them to move past each other" />
                        <OTText id="081c4cdc-b5d8-11df-b7e0-e7f9adce28b0" text="creates a chemical reaction that turns the solid into a liquid" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="081c25ca-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="081c4cdd-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_8">
                  <prompt>
                    <OTText id="081c4cde-b5d8-11df-b7e0-e7f9adce28b0" text="8. When nitrogen gas is cooled to a low enough temperature, it becomes a liquid. Why?" />
                  </prompt>
                  <input>
                    <OTChoice id="081c4cdf-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="081c73f0-b5d8-11df-b7e0-e7f9adce28b0" text="The energy of the nitrogen gas decreases, and the nitrogen molecules stop moving." />
                        <OTText id="081c73f1-b5d8-11df-b7e0-e7f9adce28b0" text="The cold energy of the nitrogen gas increases, and the nitrogen molecules bind together." />
                        <OTText id="081c73f2-b5d8-11df-b7e0-e7f9adce28b0" text="A chemical reaction happens, and the nitrogen gas changes into water." />
                        <OTText id="081c73f3-b5d8-11df-b7e0-e7f9adce28b0" text="The nitrogen molecules move more slowly and don't have enough energy to overcome their attractive forces." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="081c73f3-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="081c9b04-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_10">
                  <prompt>
                    <OTText id="081c9b05-b5d8-11df-b7e0-e7f9adce28b0" text="9. One substance can have a higher boiling point than another substance. This is because the molecules of a substance with a higher boiling point" />
                  </prompt>
                  <input>
                    <OTChoice id="081c9b06-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="081c9b07-b5d8-11df-b7e0-e7f9adce28b0" text="have weaker attractions to each other" />
                        <OTText id="081c9b08-b5d8-11df-b7e0-e7f9adce28b0" text="have stronger attractions to each other" />
                        <OTText id="081cc219-b5d8-11df-b7e0-e7f9adce28b0" text="are harder to break down into atoms" />
                        <OTText id="081cc21a-b5d8-11df-b7e0-e7f9adce28b0" text="do not absorb heat well" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="081c9b08-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="081ce92b-b5d8-11df-b7e0-e7f9adce28b0" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v3_post/page2.cml">
                  <prompt>
                    <OTText id="081ce92c-b5d8-11df-b7e0-e7f9adce28b0" text="10. When water is boiling, the temperature of the boiling water stays at 100°C, even though heat energy is continually transferred to the water. Why does the temperature stay the same?" />
                  </prompt>
                  <input>
                    <OTChoice id="081ce92d-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="081ce92e-b5d8-11df-b7e0-e7f9adce28b0" text="The heat energy is being used to break up the water molecules into hydrogen and oxygen molecules." />
                        <OTText id="081d103f-b5d8-11df-b7e0-e7f9adce28b0" text="The heat energy is being used to overcome the attractions between molecules." />
                        <OTText id="081d1040-b5d8-11df-b7e0-e7f9adce28b0" text="The heat energy is being used to destroy some of the hydrogen and oxygen atoms that make up the water molecules." />
                        <OTText id="081d1041-b5d8-11df-b7e0-e7f9adce28b0" text="Water cannot get any hotter than 100°C. That is its maximum temperature." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="081d103f-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="081d3752-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_11">
                  <prompt>
                    <OTText id="081d5e63-b5d8-11df-b7e0-e7f9adce28b0" text="11. As water evaporates from your skin, it feels cooler there. This is because during evaporation" />
                  </prompt>
                  <input>
                    <OTChoice id="081d5e64-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="081d5e65-b5d8-11df-b7e0-e7f9adce28b0" text="the molecules with the highest energy evaporate first, lowering the temperature of the remaining water" />
                        <OTText id="081d8576-b5d8-11df-b7e0-e7f9adce28b0" text="water molecules condense in the air around the water, cooling the nearby skin molecules" />
                        <OTText id="081d8577-b5d8-11df-b7e0-e7f9adce28b0" text="cold energy is transmitted through collisions from the water molecules to the skin molecules" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="081d5e65-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="081dac88-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_12">
                  <prompt>
                    <OTText id="081dac89-b5d8-11df-b7e0-e7f9adce28b0" text="12. The pressure a gas exerts on the surface of an object is affected by which of the following factors?" />
                  </prompt>
                  <input>
                    <OTChoice id="081dac8a-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="081dac8b-b5d8-11df-b7e0-e7f9adce28b0" text="the mass of the individual molecules that are colliding against the object" />
                        <OTText id="081dac8c-b5d8-11df-b7e0-e7f9adce28b0" text="the frequency of the molecular collisions against the object" />
                        <OTText id="081dac8d-b5d8-11df-b7e0-e7f9adce28b0" text="the force with which each molecule collides against the object" />
                        <OTText id="081dac8e-b5d8-11df-b7e0-e7f9adce28b0" text="both A and B" />
                        <OTText id="081dd39f-b5d8-11df-b7e0-e7f9adce28b0" text="both B and C" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="081dd39f-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="081dfab0-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_13">
                  <prompt>
                    <OTText id="081dfab1-b5d8-11df-b7e0-e7f9adce28b0" text="13. A balloon filled with a gas will expand when heated. Why does this happen?" />
                  </prompt>
                  <input>
                    <OTChoice id="081dfab2-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="081dfab3-b5d8-11df-b7e0-e7f9adce28b0" text="The number of atoms inside the balloon increases, so the atoms take up more space." />
                        <OTText id="081dfab4-b5d8-11df-b7e0-e7f9adce28b0" text="The atoms collide more forcefully, increasing the space between them." />
                        <OTText id="081e21c5-b5d8-11df-b7e0-e7f9adce28b0" text="The material between atoms expands, increasing the size of the balloon." />
                        <OTText id="081e21c6-b5d8-11df-b7e0-e7f9adce28b0" text="The forces between atoms weaken, allowing the atoms to separate from each other." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="081dfab4-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="081e21c7-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_14">
                  <prompt>
                    <OTText id="081e21c8-b5d8-11df-b7e0-e7f9adce28b0" text="14. A container is filled with a gas. How can the gas pressure be increased if the volume of the container remains the same?" />
                  </prompt>
                  <input>
                    <OTChoice id="081e21c9-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="081e48da-b5d8-11df-b7e0-e7f9adce28b0" text="by either increasing the number of molecules or increasing the temperature" />
                        <OTText id="081e48db-b5d8-11df-b7e0-e7f9adce28b0" text="by either increasing the number of molecules or decreasing the temperature" />
                        <OTText id="081e48dc-b5d8-11df-b7e0-e7f9adce28b0" text="by either decreasing the number of molecules or increasing the temperature" />
                        <OTText id="081e48dd-b5d8-11df-b7e0-e7f9adce28b0" text="by either decreasing the number of molecules or decreasing the temperature" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="081e48da-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0aa2a9ce-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_15">
                  <prompt>
                    <OTText id="0aa2a9cf-b5d8-11df-b7e0-e7f9adce28b0" text="15. If the volume of a gas increases while its temperature and number of molecules remain constant, what happens to the pressure?" />
                  </prompt>
                  <input>
                    <OTChoice id="0aa2a9d0-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0aa2a9d1-b5d8-11df-b7e0-e7f9adce28b0" text="The pressure increases." />
                        <OTText id="0aa2a9d2-b5d8-11df-b7e0-e7f9adce28b0" text="The pressure decreases." />
                        <OTText id="0aa2d0e3-b5d8-11df-b7e0-e7f9adce28b0" text="The pressure stays the same." />
                        <OTText id="0aa2d0e4-b5d8-11df-b7e0-e7f9adce28b0" text="It depends on the type of gas." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0aa2a9d2-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0aa2d0e5-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_16">
                  <prompt>
                    <OTText id="0aa2d0e6-b5d8-11df-b7e0-e7f9adce28b0" text="16. A balloon is inside a very warm house. A student brings the balloon outside into the cold winter air. What should happen to the size of the balloon?" />
                  </prompt>
                  <input>
                    <OTChoice id="0aa2d0e7-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0aa2f7f8-b5d8-11df-b7e0-e7f9adce28b0" text="The balloon will get larger." />
                        <OTText id="0aa2f7f9-b5d8-11df-b7e0-e7f9adce28b0" text="The balloon will get smaller." />
                        <OTText id="0aa2f7fa-b5d8-11df-b7e0-e7f9adce28b0" text="The balloon will stay the same size." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0aa2f7f9-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0aa31f0b-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_17">
                  <prompt>
                    <OTText id="0aa31f0c-b5d8-11df-b7e0-e7f9adce28b0" text="17. As you pump up a basketball, the pressure inside increases because there are more molecular collisions. This is PRIMARILY because pumping up the ball" />
                  </prompt>
                  <input>
                    <OTChoice id="0aa31f0d-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0aa31f0e-b5d8-11df-b7e0-e7f9adce28b0" text="adds energy, so the molecules move around much more quickly" />
                        <OTText id="0aa31f0f-b5d8-11df-b7e0-e7f9adce28b0" text="adds more air molecules" />
                        <OTText id="0aa31f10-b5d8-11df-b7e0-e7f9adce28b0" text="increases the friction between the added air molecules and those originally inside the ball" />
                        <OTText id="0aa34621-b5d8-11df-b7e0-e7f9adce28b0" text="causes the ball to get significantly larger" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0aa31f0f-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0aa36d32-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_18">
                  <prompt>
                    <OTText id="0aa36d33-b5d8-11df-b7e0-e7f9adce28b0" text="18. If a boy expands his lungs while holding his breath, the air pressure in his lungs will decrease. Why? (Assume the temperature of the air in his lungs remains constant.)" />
                  </prompt>
                  <input>
                    <OTChoice id="0aa36d34-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0aa36d35-b5d8-11df-b7e0-e7f9adce28b0" text="Expanding his lungs slows down the air molecules, causing fewer collisions between them." />
                        <OTText id="0aa3e266-b5d8-11df-b7e0-e7f9adce28b0" text="Expanding his lungs allows more air molecules to be dissolved into the blood, causing fewer collisions between them." />
                        <OTText id="0aa3e267-b5d8-11df-b7e0-e7f9adce28b0" text="Expanding his lungs gives the air molecules more space, causing fewer collisions between them." />
                        <OTText id="0aa3e268-b5d8-11df-b7e0-e7f9adce28b0" text="Expanding his lungs adds energy to the air molecules, causing more collisions between them." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0aa3e267-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0aa40979-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_19">
                  <prompt>
                    <OTText id="0aa4097a-b5d8-11df-b7e0-e7f9adce28b0" text="19. One balloon is twice the volume of another. If both balloons are at the same pressure and temperature, the larger balloon holds" />
                  </prompt>
                  <input>
                    <OTChoice id="0aa4097b-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0aa4097c-b5d8-11df-b7e0-e7f9adce28b0" text="the same number of molecules as the smaller one" />
                        <OTText id="0aa4097d-b5d8-11df-b7e0-e7f9adce28b0" text="twice the number of molecules as the smaller one" />
                        <OTText id="0aa4308e-b5d8-11df-b7e0-e7f9adce28b0" text="half the number of molecules as the smaller one" />
                        <OTText id="0aa4308f-b5d8-11df-b7e0-e7f9adce28b0" text="four times the number of molecules as the smaller one" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0aa4097d-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0aa457a0-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_20">
                  <prompt>
                    <OTText id="0aa457a1-b5d8-11df-b7e0-e7f9adce28b0" text="20. Most spray cans have a warning that says to keep away from extreme heat because of risk of explosion. Why would heating a sealed can cause it to explode?" />
                  </prompt>
                  <input>
                    <OTChoice id="0aa457a2-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0aa457a3-b5d8-11df-b7e0-e7f9adce28b0" text="Heating expands the metal of the can, which weakens the seals and allows the already high-pressure gas to escape." />
                        <OTText id="0aa47eb4-b5d8-11df-b7e0-e7f9adce28b0" text="Heating causes a chemical reaction, which creates more gas molecules." />
                        <OTText id="0aa47eb5-b5d8-11df-b7e0-e7f9adce28b0" text="Heating compresses the gases inside the can, which increases the pressure." />
                        <OTText id="0aa47eb6-b5d8-11df-b7e0-e7f9adce28b0" text="Heating increases the force and frequency of molecules colliding with the container." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0aa47eb6-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0aa4a5c7-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_21">
                  <prompt>
                    <OTText id="0aa4a5c8-b5d8-11df-b7e0-e7f9adce28b0" text="21. A student places one end of a paper towel in a bowl of water. Why does the paper towel soak up some of the water?" />
                  </prompt>
                  <input>
                    <OTChoice id="0aa4a5c9-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0aa4a5ca-b5d8-11df-b7e0-e7f9adce28b0" text="Water molecules chemically react with molecules of the paper towel." />
                        <OTText id="0aa4a5cb-b5d8-11df-b7e0-e7f9adce28b0" text="Water molecules are attracted to molecules of the paper towel." />
                        <OTText id="0aa4a5cc-b5d8-11df-b7e0-e7f9adce28b0" text="Water molecules repel each other and use the paper towel as a way to spread out more." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0aa4a5cb-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0aa4ccdd-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_22">
                  <prompt>
                    <OTText id="0aa4ccde-b5d8-11df-b7e0-e7f9adce28b0" text="22. One substance is made from polar molecules, and another substance is made from non-polar molecules that are similar in size and shape to the polar ones. Which substance has the higher boiling point?" />
                  </prompt>
                  <input>
                    <OTChoice id="0aa4ccdf-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0aa4cce0-b5d8-11df-b7e0-e7f9adce28b0" text="the substance made from polar molecules" />
                        <OTText id="0aa4cce1-b5d8-11df-b7e0-e7f9adce28b0" text="the substance made from non-polar molecules" />
                        <OTText id="0aa4f3f2-b5d8-11df-b7e0-e7f9adce28b0" text="Both have the same boiling point." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0aa4cce0-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0aa4f3f3-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_23">
                  <prompt>
                    <OTText id="0aa4f3f4-b5d8-11df-b7e0-e7f9adce28b0" text="23. What is the reason for your answer above?" />
                  </prompt>
                  <input>
                    <OTChoice id="0aa4f3f5-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0aa51b06-b5d8-11df-b7e0-e7f9adce28b0" text="Polar molecules form covalent bonds that are much stronger than non-polar bonds." />
                        <OTText id="0aa51b07-b5d8-11df-b7e0-e7f9adce28b0" text="Non-polar molecules attract to all other kinds of molecules." />
                        <OTText id="0aa51b08-b5d8-11df-b7e0-e7f9adce28b0" text="Molecules of similar size and shape attract to each other equally." />
                        <OTText id="0aa51b09-b5d8-11df-b7e0-e7f9adce28b0" text="The intermolecular attractions of polar molecules are stronger than those of non-polar molecules." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0aa51b09-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0cd7b27a-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_24">
                  <prompt>
                    <OTText id="0cd7b27b-b5d8-11df-b7e0-e7f9adce28b0" text="24. A solid made of molecules that fit closely together will melt at" />
                  </prompt>
                  <input>
                    <OTChoice id="0cd7b27c-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0cd7b27d-b5d8-11df-b7e0-e7f9adce28b0" text="a lower temperature than loosely packed molecules" />
                        <OTText id="0cd7b27e-b5d8-11df-b7e0-e7f9adce28b0" text="a higher temperature than loosely packed molecules" />
                        <OTText id="0cd8009f-b5d8-11df-b7e0-e7f9adce28b0" text="the same temperature as loosely packed molecules" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0cd7b27e-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0cd827b0-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_25">
                  <prompt>
                    <OTText id="0cd827b1-b5d8-11df-b7e0-e7f9adce28b0" text="25. Oil and water DO NOT mix. Why?" />
                  </prompt>
                  <input>
                    <OTChoice id="0cd827b2-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0cd827b3-b5d8-11df-b7e0-e7f9adce28b0" text="Oil molecules repel water molecules." />
                        <OTText id="0cd827b4-b5d8-11df-b7e0-e7f9adce28b0" text="Water molecules repel oil molecules." />
                        <OTText id="0cd84ec5-b5d8-11df-b7e0-e7f9adce28b0" text="Water molecules attract to other water molecules more strongly than to oil molecules." />
                        <OTText id="0cd84ec6-b5d8-11df-b7e0-e7f9adce28b0" text="Water molecules are non-polar, so they don't attract to oil molecules very well." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0cd84ec5-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0cd8eb07-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_26">
                  <prompt>
                    <OTText id="0cd8eb08-b5d8-11df-b7e0-e7f9adce28b0" text="26. What happens when salt dissolves in water?" />
                  </prompt>
                  <input>
                    <OTChoice id="0cd8eb09-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0cd8eb0a-b5d8-11df-b7e0-e7f9adce28b0" text="The salt ions attract to and are surrounded by water molecules." />
                        <OTText id="0cd8eb0b-b5d8-11df-b7e0-e7f9adce28b0" text="The salt reacts with the water to form a new substance." />
                        <OTText id="0cd9121c-b5d8-11df-b7e0-e7f9adce28b0" text="The salt molecules change into water molecules." />
                        <OTText id="0cd9121d-b5d8-11df-b7e0-e7f9adce28b0" text="The salt ions are destroyed when they come in contact with water." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0cd8eb0a-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0cd9392e-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_27">
                  <prompt>
                    <OTText id="0cd9392f-b5d8-11df-b7e0-e7f9adce28b0" text="27. Sugar dissolves faster in hot water than in cold water. This is because the warmer temperature speeds up the rate at which sugar molecules" />
                  </prompt>
                  <input>
                    <OTChoice id="0cd93930-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0cd93931-b5d8-11df-b7e0-e7f9adce28b0" text="form attractions to water molecules" />
                        <OTText id="0cd93932-b5d8-11df-b7e0-e7f9adce28b0" text="change into water molecules" />
                        <OTText id="0cd93933-b5d8-11df-b7e0-e7f9adce28b0" text="chemically react with water molecules" />
                        <OTText id="0cd93934-b5d8-11df-b7e0-e7f9adce28b0" text="are destroyed" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0cd93931-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0cd96045-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_28">
                  <prompt>
                    <OTText id="0cd96046-b5d8-11df-b7e0-e7f9adce28b0" text="28. Table salt (NaCl) dissolves easily in water, but silver chloride (AgCl) does not. Why?" />
                  </prompt>
                  <input>
                    <OTChoice id="0cd96047-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0cd96048-b5d8-11df-b7e0-e7f9adce28b0" text="Ag and Cl ions attract better to themselves than to water molecules." />
                        <OTText id="0cd96049-b5d8-11df-b7e0-e7f9adce28b0" text="NaCl has a lower melting point than AgCl." />
                        <OTText id="0cd9604a-b5d8-11df-b7e0-e7f9adce28b0" text="NaCl chemically reacts with water to form a new substance." />
                        <OTText id="0cd9604b-b5d8-11df-b7e0-e7f9adce28b0" text="Ag and Cl ions are repelled by water molecules." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0cd96048-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0cd9875c-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_29">
                  <prompt>
                    <OTText id="0cd9875d-b5d8-11df-b7e0-e7f9adce28b0" text="29. Which of the following subatomic particles repel each other but are attracted to a nucleus?" />
                  </prompt>
                  <input>
                    <OTChoice id="0cd9875e-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0cd9875f-b5d8-11df-b7e0-e7f9adce28b0" text="protons" />
                        <OTText id="0cd98760-b5d8-11df-b7e0-e7f9adce28b0" text="neutrons" />
                        <OTText id="0cd98761-b5d8-11df-b7e0-e7f9adce28b0" text="electrons" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0cd98761-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0cd9ae72-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_30">
                  <prompt>
                    <OTText id="0cd9ae73-b5d8-11df-b7e0-e7f9adce28b0" text="30. The central atom of a molecule has two areas of electron density surrounding it. What is the geometry around this central atom?" />
                  </prompt>
                  <input>
                    <OTChoice id="0cd9ae74-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0cd9ae75-b5d8-11df-b7e0-e7f9adce28b0" text="a straight line" />
                        <OTText id="0cd9ae76-b5d8-11df-b7e0-e7f9adce28b0" text="a bent line" />
                        <OTText id="0cd9ae77-b5d8-11df-b7e0-e7f9adce28b0" text="a flat, triangular geometry" />
                        <OTText id="0cd9d588-b5d8-11df-b7e0-e7f9adce28b0" text="a four-corner pyramid geometry" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0cd9ae75-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0cd9d589-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_31">
                  <prompt>
                    <OTText id="0cd9d58a-b5d8-11df-b7e0-e7f9adce28b0" text="31. The central atom of a molecule has three areas of electron density surrounding it and is bonded to three other atoms. What is the geometry around this central atom?" />
                  </prompt>
                  <input>
                    <OTChoice id="0cd9d58b-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0cd9d58c-b5d8-11df-b7e0-e7f9adce28b0" text="a straight line" />
                        <OTText id="0cd9d58d-b5d8-11df-b7e0-e7f9adce28b0" text="a bent line" />
                        <OTText id="0cd9fc9e-b5d8-11df-b7e0-e7f9adce28b0" text="a flat, triangular geometry" />
                        <OTText id="0cd9fc9f-b5d8-11df-b7e0-e7f9adce28b0" text="a four-corner pyramid geometry" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0cd9fc9e-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0f4d6da0-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_32">
                  <prompt>
                    <OTText id="0f4d6da1-b5d8-11df-b7e0-e7f9adce28b0" text="32. Why does methane (CH4) form a tetrahedral shape rather than remaining a flat molecule, as shown in the Lewis dot diagram above?" />
                  </prompt>
                  <input>
                    <OTChoice id="0f4d6da2-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0f4d6da3-b5d8-11df-b7e0-e7f9adce28b0" text="All of the hydrogen atoms attract to each other, causing the tetrahedral shape to occur." />
                        <OTText id="0f4d6da4-b5d8-11df-b7e0-e7f9adce28b0" text="The carbon atom pulls equally on all of the electrons in the C-H bonds." />
                        <OTText id="0f4d6da5-b5d8-11df-b7e0-e7f9adce28b0" text="The electron pairs shared in the C-H bonds repel each other, forming a tetrahedral molecule." />
                        <OTText id="0f4d6da6-b5d8-11df-b7e0-e7f9adce28b0" text="Molecules can’t be flat. They all have three-dimensional shapes." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0f4d6da5-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0f4dbbc7-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_33">
                  <prompt>
                    <OTText id="0f4dbbc8-b5d8-11df-b7e0-e7f9adce28b0" text="33. Above is the Lewis dot diagram for COCl2. What is the most likely shape for this molecule?" />
                  </prompt>
                  <input>
                    <OTChoice id="0f4dbbc9-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0f4dbbca-b5d8-11df-b7e0-e7f9adce28b0" text="linear" />
                        <OTText id="0f4ea62b-b5d8-11df-b7e0-e7f9adce28b0" text="bent" />
                        <OTText id="0f4ea62c-b5d8-11df-b7e0-e7f9adce28b0" text="tetrahedral (four-corner pyramid shape)" />
                        <OTText id="0f4ea62d-b5d8-11df-b7e0-e7f9adce28b0" text="trigonal planar (flat but shaped like a triangle)" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0f4ea62d-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0f4ecd3e-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_34">
                  <prompt>
                    <OTText id="0f4ecd3f-b5d8-11df-b7e0-e7f9adce28b0" text="34. The Lewis dot diagram shown above has an unshared pair of electrons. This unshared pair of electrons" />
                  </prompt>
                  <input>
                    <OTChoice id="0f4ecd40-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0f4ef451-b5d8-11df-b7e0-e7f9adce28b0" text="causes the molecule to lie flat in a plane" />
                        <OTText id="0f4ef452-b5d8-11df-b7e0-e7f9adce28b0" text="causes the molecule to form a trigonal pyramidal shape" />
                        <OTText id="0f4ef453-b5d8-11df-b7e0-e7f9adce28b0" text="causes the molecule to be bent" />
                        <OTText id="0f4ef454-b5d8-11df-b7e0-e7f9adce28b0" text="has no effect on the shape of the molecule" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0f4ef452-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0f4f1b65-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_35">
                  <prompt>
                    <OTText id="0f4f1b66-b5d8-11df-b7e0-e7f9adce28b0" text="35. Three regions of electron density surround" />
                  </prompt>
                  <input>
                    <OTChoice id="0f4f1b67-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0f4f1b68-b5d8-11df-b7e0-e7f9adce28b0" text="Atom A" />
                        <OTText id="0f4f1b69-b5d8-11df-b7e0-e7f9adce28b0" text="Atom B" />
                        <OTText id="0f4f1b6a-b5d8-11df-b7e0-e7f9adce28b0" text="Atom C" />
                        <OTText id="0f4f1b6b-b5d8-11df-b7e0-e7f9adce28b0" text="Atoms A and B" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0f4f1b6a-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0f4f427c-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_36">
                  <prompt>
                    <OTText id="0f4f427d-b5d8-11df-b7e0-e7f9adce28b0" text="36. Four regions of electron density surround" />
                  </prompt>
                  <input>
                    <OTChoice id="0f4f427e-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0f4f427f-b5d8-11df-b7e0-e7f9adce28b0" text="Atom A" />
                        <OTText id="0f4f6990-b5d8-11df-b7e0-e7f9adce28b0" text="Atom B" />
                        <OTText id="0f4f6991-b5d8-11df-b7e0-e7f9adce28b0" text="Atom C" />
                        <OTText id="0f4f6992-b5d8-11df-b7e0-e7f9adce28b0" text="Atoms A and B" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0f4f6992-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0f4f6993-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_37">
                  <prompt>
                    <OTText id="0f4f90a4-b5d8-11df-b7e0-e7f9adce28b0" text="37. Atoms form a covalent bond by" />
                  </prompt>
                  <input>
                    <OTChoice id="0f4f90a5-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0f4f90a6-b5d8-11df-b7e0-e7f9adce28b0" text="sharing protons" />
                        <OTText id="0f4f90a7-b5d8-11df-b7e0-e7f9adce28b0" text="sharing neutrons" />
                        <OTText id="0f4fdec8-b5d8-11df-b7e0-e7f9adce28b0" text="sharing electrons" />
                        <OTText id="0f4fdec9-b5d8-11df-b7e0-e7f9adce28b0" text="getting close enough that their nuclei touch" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0f4fdec8-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="0f5053fa-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_38">
                  <prompt>
                    <OTText id="0f5053fb-b5d8-11df-b7e0-e7f9adce28b0" text="38. A polar molecule MUST have" />
                  </prompt>
                  <input>
                    <OTChoice id="0f5053fc-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="0f5053fd-b5d8-11df-b7e0-e7f9adce28b0" text="an overall positive charge" />
                        <OTText id="0f5053fe-b5d8-11df-b7e0-e7f9adce28b0" text="an overall negative charge" />
                        <OTText id="0f5053ff-b5d8-11df-b7e0-e7f9adce28b0" text="no overall charge" />
                        <OTText id="0f505400-b5d8-11df-b7e0-e7f9adce28b0" text="a part that has a positive charge and a part that has a negative charge" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="0f505400-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="11b9d9f1-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_39">
                  <prompt>
                    <OTText id="11b9d9f2-b5d8-11df-b7e0-e7f9adce28b0" text="39. A bond formed between two atoms with a moderate difference in electronegativity is" />
                  </prompt>
                  <input>
                    <OTChoice id="11b9d9f3-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="11ba0104-b5d8-11df-b7e0-e7f9adce28b0" text="ionic" />
                        <OTText id="11ba0105-b5d8-11df-b7e0-e7f9adce28b0" text="polar covalent" />
                        <OTText id="11ba0106-b5d8-11df-b7e0-e7f9adce28b0" text="non-polar covalent" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="11ba0105-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="11ba0107-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_40">
                  <prompt>
                    <OTText id="11ba0108-b5d8-11df-b7e0-e7f9adce28b0" text="40. What is the reason for your answer above?" />
                  </prompt>
                  <input>
                    <OTChoice id="11ba0109-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="11ba281a-b5d8-11df-b7e0-e7f9adce28b0" text="Electronegativity is a measure of the charge of an atom." />
                        <OTText id="11ba281b-b5d8-11df-b7e0-e7f9adce28b0" text="Electronegativity is a measure of how well an atom holds on to its own electrons." />
                        <OTText id="11ba281c-b5d8-11df-b7e0-e7f9adce28b0" text="Electronegativity is a measure of how well an atom can attract electrons from other atoms." />
                        <OTText id="11ba281d-b5d8-11df-b7e0-e7f9adce28b0" text="Electronegativity is a measure of the size of an atom." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="11ba281c-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="11ba4f2e-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_41">
                  <prompt>
                    <OTText id="11ba4f2f-b5d8-11df-b7e0-e7f9adce28b0" text="41. A bond formed between two atoms that both have high electronegativity is" />
                  </prompt>
                  <input>
                    <OTChoice id="11ba4f30-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="11ba4f31-b5d8-11df-b7e0-e7f9adce28b0" text="ionic" />
                        <OTText id="11ba4f32-b5d8-11df-b7e0-e7f9adce28b0" text="polar covalent" />
                        <OTText id="11ba4f33-b5d8-11df-b7e0-e7f9adce28b0" text="non-polar covalent" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="11ba4f33-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="11ba7544-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_42">
                  <prompt>
                    <OTText id="11ba9c55-b5d8-11df-b7e0-e7f9adce28b0" text="42. A molecule that is polar must contain" />
                  </prompt>
                  <input>
                    <OTChoice id="11ba9c56-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="11ba9c57-b5d8-11df-b7e0-e7f9adce28b0" text="all polar covalent bonds" />
                        <OTText id="11ba9c58-b5d8-11df-b7e0-e7f9adce28b0" text="mostly non-polar bonds and one polar bond" />
                        <OTText id="11ba9c59-b5d8-11df-b7e0-e7f9adce28b0" text="one or more non-polar bonds" />
                        <OTText id="11ba9c5a-b5d8-11df-b7e0-e7f9adce28b0" text="one or more polar bonds" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="11ba9c5a-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="11bac36b-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_43">
                  <prompt>
                    <OTText id="11bac36c-b5d8-11df-b7e0-e7f9adce28b0" text="43. In a non-polar covalent bond, both atoms have an identical or very similar charge. Why?" />
                  </prompt>
                  <input>
                    <OTChoice id="11bac36d-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="11bac36e-b5d8-11df-b7e0-e7f9adce28b0" text="Electrons are shared evenly in non-polar covalent bonds." />
                        <OTText id="11bac36f-b5d8-11df-b7e0-e7f9adce28b0" text="The charge is determined by the distance between the atoms." />
                        <OTText id="11bac370-b5d8-11df-b7e0-e7f9adce28b0" text="Non-polar atoms are made from neutrons, which have no charge." />
                        <OTText id="11bac371-b5d8-11df-b7e0-e7f9adce28b0" text="The polarity of each atom is canceled out, which makes the bond non-polar." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="11bac36e-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="11baea82-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_44">
                  <prompt>
                    <OTText id="11baea83-b5d8-11df-b7e0-e7f9adce28b0" text="44. Melting water is NOT a chemical reaction. Why?" />
                  </prompt>
                  <input>
                    <OTChoice id="11baea84-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="11baea85-b5d8-11df-b7e0-e7f9adce28b0" text="The temperature is not high enough." />
                        <OTText id="11baea86-b5d8-11df-b7e0-e7f9adce28b0" text="No chemical bonds are broken." />
                        <OTText id="11baea87-b5d8-11df-b7e0-e7f9adce28b0" text="No chemical bonds are formed." />
                        <OTText id="11baea88-b5d8-11df-b7e0-e7f9adce28b0" text="Both B and C" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="11baea88-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="11bb1199-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_45">
                  <prompt>
                    <OTText id="11bb119a-b5d8-11df-b7e0-e7f9adce28b0" text="45. If the temperature of a chemical reaction is increased, the speed of the reaction is typically" />
                  </prompt>
                  <input>
                    <OTChoice id="11bb119b-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="11bb119c-b5d8-11df-b7e0-e7f9adce28b0" text="increased" />
                        <OTText id="11bb119d-b5d8-11df-b7e0-e7f9adce28b0" text="decreased" />
                        <OTText id="11bb119e-b5d8-11df-b7e0-e7f9adce28b0" text="not affected" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="11bb119c-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="11bb38af-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_46">
                  <prompt>
                    <OTText id="11bb38b0-b5d8-11df-b7e0-e7f9adce28b0" text="46. What is the reason for your answer above?" />
                  </prompt>
                  <input>
                    <OTChoice id="11bb38b1-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="11bb38b2-b5d8-11df-b7e0-e7f9adce28b0" text="Reactants at a higher temperature interact less often than reactants at a cooler temperature." />
                        <OTText id="11bb38b3-b5d8-11df-b7e0-e7f9adce28b0" text="Reactants at a higher temperature collide more often than reactants at a cooler temperature." />
                        <OTText id="11bb38b4-b5d8-11df-b7e0-e7f9adce28b0" text="Reactants at a higher temperature stick together better than reactants at a cooler temperature." />
                        <OTText id="11bbd4f5-b5d8-11df-b7e0-e7f9adce28b0" text="The speed of a reaction cannot be changed." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="11bb38b3-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="14a38b96-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_47">
                  <prompt>
                    <OTText id="14a38b97-b5d8-11df-b7e0-e7f9adce28b0" text="47. A concentrated acid is more reactive, and therefore more dangerous, than a dilute acid. This is because the molecules of a concentrated acid" />
                  </prompt>
                  <input>
                    <OTChoice id="14a38b98-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="14a38b99-b5d8-11df-b7e0-e7f9adce28b0" text="form a different substance than they do in a dilute acid" />
                        <OTText id="14a38b9a-b5d8-11df-b7e0-e7f9adce28b0" text="have more collisions with whatever they are reacting with than the molecules of a dilute acid" />
                        <OTText id="14a38b9b-b5d8-11df-b7e0-e7f9adce28b0" text="form stronger bonds with whatever they are reacting with than the molecules of the dilute acid" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="14a38b9a-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="14a3b2ac-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_48">
                  <prompt>
                    <OTText id="14a3b2ad-b5d8-11df-b7e0-e7f9adce28b0" text="48. Which of the following must be the same for both the reactants and products of a chemical reaction?" />
                  </prompt>
                  <input>
                    <OTChoice id="14a3b2ae-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="14a3b2af-b5d8-11df-b7e0-e7f9adce28b0" text="the total mass" />
                        <OTText id="14a3b2b0-b5d8-11df-b7e0-e7f9adce28b0" text="the total number of molecules" />
                        <OTText id="14a3b2b1-b5d8-11df-b7e0-e7f9adce28b0" text="the total number of atoms of each element" />
                        <OTText id="14a3d9c2-b5d8-11df-b7e0-e7f9adce28b0" text="both A and B" />
                        <OTText id="14a3d9c3-b5d8-11df-b7e0-e7f9adce28b0" text="both A and C" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="14a3d9c3-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="14a3d9c4-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_49">
                  <prompt>
                    <OTText id="14a3d9c5-b5d8-11df-b7e0-e7f9adce28b0">
                      <text>     CH4 + O2 → CO2 + 2 H2O
49. What is one reason the above equation is NOT balanced correctly?</text>
                    </OTText>
                  </prompt>
                  <input>
                    <OTChoice id="14a400d6-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="14a400d7-b5d8-11df-b7e0-e7f9adce28b0" text="The reaction ends with more carbon atoms than it starts with." />
                        <OTText id="14a400d8-b5d8-11df-b7e0-e7f9adce28b0" text="The reaction ends with more hydrogen atoms than it starts with." />
                        <OTText id="14a400d9-b5d8-11df-b7e0-e7f9adce28b0" text="The reaction ends with more oxygen atoms than it starts with." />
                        <OTText id="14a400da-b5d8-11df-b7e0-e7f9adce28b0" text="All of the above." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="14a400d9-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="14a4c42b-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_50">
                  <prompt>
                    <OTText id="14a4c42c-b5d8-11df-b7e0-e7f9adce28b0">
                      <text>50. The following diagram represents a mixture of S atoms and O2 molecules in a closed container: 
Which diagram below shows the results after the mixture reacts as completely as possible according to the equation?</text>
                    </OTText>
                  </prompt>
                  <input>
                    <OTChoice id="14a4c42d-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="14a4eb3e-b5d8-11df-b7e0-e7f9adce28b0" text="Diagram a" />
                        <OTText id="14a4eb3f-b5d8-11df-b7e0-e7f9adce28b0" text="Diagram b" />
                        <OTText id="14a4eb40-b5d8-11df-b7e0-e7f9adce28b0" text="Diagram c" />
                        <OTText id="14a4eb41-b5d8-11df-b7e0-e7f9adce28b0" text="Diagram d" />
                        <OTText id="14a4eb42-b5d8-11df-b7e0-e7f9adce28b0" text="Diagram e" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="14a4eb41-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="14a51253-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_51">
                  <prompt>
                    <OTText id="14a51254-b5d8-11df-b7e0-e7f9adce28b0" text="51. What is the limiting reactant in the reaction shown in Question 50?" />
                  </prompt>
                  <input>
                    <OTChoice id="14a51255-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="14a51256-b5d8-11df-b7e0-e7f9adce28b0" text="sulfur (S)" />
                        <OTText id="14a51257-b5d8-11df-b7e0-e7f9adce28b0" text="oxygen (O2)" />
                        <OTText id="14a51258-b5d8-11df-b7e0-e7f9adce28b0" text="sulfur trioxide (SO3)" />
                        <OTText id="14a51259-b5d8-11df-b7e0-e7f9adce28b0" text="both sulfur and oxygen" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="14a51257-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="14a5396a-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_52">
                  <prompt>
                    <OTText id="14a5396b-b5d8-11df-b7e0-e7f9adce28b0" text="52. What kind of reaction is shown above?" />
                  </prompt>
                  <input>
                    <OTChoice id="14a5396c-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="14a5396d-b5d8-11df-b7e0-e7f9adce28b0" text="synthesis" />
                        <OTText id="14a5396e-b5d8-11df-b7e0-e7f9adce28b0" text="decomposition" />
                        <OTText id="14a5396f-b5d8-11df-b7e0-e7f9adce28b0" text="single replacement" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="14a5396d-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="14a56080-b5d8-11df-b7e0-e7f9adce28b0" name="ChemMCI_53">
                  <prompt>
                    <OTText id="14a56081-b5d8-11df-b7e0-e7f9adce28b0" text="53. What kind of reaction is shown above?" />
                  </prompt>
                  <input>
                    <OTChoice id="14a56082-b5d8-11df-b7e0-e7f9adce28b0" selectionUI="0">
                      <choices>
                        <OTText id="14a56083-b5d8-11df-b7e0-e7f9adce28b0" text="synthesis" />
                        <OTText id="14a56084-b5d8-11df-b7e0-e7f9adce28b0" text="decomposition" />
                        <OTText id="14a56085-b5d8-11df-b7e0-e7f9adce28b0" text="single replacement" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="14a56085-b5d8-11df-b7e0-e7f9adce28b0" />
                  </correctAnswer>
                </OTQuestion>
              </questions>
            </OTModelerPage>
            <OTWorkgroupMemberChooser />
          </layers>
        </OTLayerContainer>
      </root>
    </OTSystem>
  </objects>
</otrunk>

