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                        <OTText id="4605b77f-600b-11de-a211-eb594fb6a35a" text="bonds tend to form rather than break." />
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                        <OTText id="49bca510-600b-11de-a211-eb594fb6a35a" text="Temperature has no effect." />
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                    <OTText id="49bdb688-600b-11de-a211-eb594fb6a35a" text="What do you think would happen if you could raise the temperature to a much higher level than is allowed using the slider above?" />
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                        <OTText id="49bdb68a-600b-11de-a211-eb594fb6a35a" text="It will just form bonds even faster." />
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                    <OTText id="4bb89c2e-600b-11de-a211-eb594fb6a35a" text="What changes did you make to the size of the container and the temperature to reach 80% completion the fastest way possible? Explain why that worked." />
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                    <OTText id="4bb8c342-600b-11de-a211-eb594fb6a35a" text="Why shouldn't you set the temperature for the highest possible value if your goal is to have about 80% of the atoms bonded to form molecules?" />
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                    <OTText id="4d2cc5a6-600b-11de-a211-eb594fb6a35a" text="Describe what happens in the following reaction: A + B2 AB + B" />
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                    <OTText id="4fe94d9a-600b-11de-a211-eb594fb6a35a" text="Which hydrogen to chlorine ratios give a reaction that forms HCl with nothing left over? (Select all that work.)" />
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                        <OTText id="4fe974ae-600b-11de-a211-eb594fb6a35a" text="2 hydrogen : 2 chlorine" />
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                        <OTText id="4fead445-600b-11de-a211-eb594fb6a35a" text="H2 + O2 --&gt; H2O" />
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                <OTQuestion id="5446b45b-600b-11de-a211-eb594fb6a35a" name="http://ri-itest.concord.org/SAMActivities/ChemicalReactions/ChemicalReactions_v4/page7.cml">
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                        <OTText id="5446b45e-600b-11de-a211-eb594fb6a35a" text="fuel" />
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                        <OTText id="5446db70-600b-11de-a211-eb594fb6a35a" text="both are limiting" />
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                <OTQuestion id="5446db71-600b-11de-a211-eb594fb6a35a" name="http://ri-itest.concord.org/SAMActivities/ChemicalReactions/ChemicalReactions_v4/page7.cml">
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                    <OTText id="54470282-600b-11de-a211-eb594fb6a35a" text="Explain why it is hard to get ALL of the fuel to react if you use exactly the right ratio of fuel to oxygen. hint" />
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                    <OTText id="54470283-600b-11de-a211-eb594fb6a35a" text="" />
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                <OTQuestion id="54470285-600b-11de-a211-eb594fb6a35a" name="http://ri-itest.concord.org/SAMActivities/ChemicalReactions/ChemicalReactions_v4/page7.cml">
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                    <OTText id="54470286-600b-11de-a211-eb594fb6a35a" text="To power your car a specific amount of gasoline (fuel) is mixed with air (containing oxygen). If the mixture is not right, then your car will not have much power, or it will be spitting out lots of unburned fuel as a pollutant, or both. What do you think is the best fuel/oxygen mixture to optimize power and reduce pollution (i.e. get the most fuel in the cylinder which can be burned efficiently)?" />
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                        <OTText id="544750a8-600b-11de-a211-eb594fb6a35a" text="use the perfect ratio of fuel to oxygen as indicated by the chemical equation" />
                        <OTText id="544750a9-600b-11de-a211-eb594fb6a35a" text="use extra fuel, making oxygen the limiting reactant" />
                        <OTText id="544750aa-600b-11de-a211-eb594fb6a35a" text="use a lot of extra oxygen, making the fuel a very limiting reactant" />
                        <OTText id="544777bb-600b-11de-a211-eb594fb6a35a" text="use a little extra oxygen, making the fuel the limiting reactant" />
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                <OTQuestion id="56de764c-600b-11de-a211-eb594fb6a35a" name="http://ri-itest.concord.org/SAMActivities/ChemicalReactions/ChemicalReactions_v4/page8.cml">
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                    <OTText id="56de764d-600b-11de-a211-eb594fb6a35a" text="Reaction 1 is what type of reaction:" />
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                <OTQuestion id="56dec473-600b-11de-a211-eb594fb6a35a" name="http://ri-itest.concord.org/SAMActivities/ChemicalReactions/ChemicalReactions_v4/page8.cml">
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                <OTQuestion id="56deeb8a-600b-11de-a211-eb594fb6a35a" name="http://ri-itest.concord.org/SAMActivities/ChemicalReactions/ChemicalReactions_v4/page8.cml">
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                    <OTText id="56deeb8b-600b-11de-a211-eb594fb6a35a" text="Reaction 3 is what type of reaction:" />
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                        <OTText id="56deeb8d-600b-11de-a211-eb594fb6a35a" text="synthesis" />
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                <OTQuestion id="58ec47c1-600b-11de-a211-eb594fb6a35a" name="http://ri-itest.concord.org/SAMActivities/ChemicalReactions/ChemicalReactions_v4/page9.cml">
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                    <OTText id="58ec47c2-600b-11de-a211-eb594fb6a35a" text="Which of the following affect the rate of reaction?" />
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                        <OTText id="58ec6ed4-600b-11de-a211-eb594fb6a35a" text="concentration of reactants" />
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                <OTQuestion id="58ec95e9-600b-11de-a211-eb594fb6a35a" name="http://ri-itest.concord.org/SAMActivities/ChemicalReactions/ChemicalReactions_v4/page9.cml">
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                    <OTText id="58ecbcfa-600b-11de-a211-eb594fb6a35a" text="Explain your answer for the previous question about factors affecting reaction rates." />
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                <OTQuestion id="58ecbcfd-600b-11de-a211-eb594fb6a35a" name="http://ri-itest.concord.org/SAMActivities/ChemicalReactions/ChemicalReactions_v4/page9.cml">
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                    <OTText id="58ecbcfe-600b-11de-a211-eb594fb6a35a" text="The process by which food rots is ultimately driven by chemical reactions. Why does refrigerating food make the food last longer? (Be sure to explain it at the molecular level.)" />
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                <OTQuestion id="58ece411-600b-11de-a211-eb594fb6a35a" name="http://ri-itest.concord.org/SAMActivities/ChemicalReactions/ChemicalReactions_v4/page9.cml">
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                    <OTText id="58ece412-600b-11de-a211-eb594fb6a35a" text="Which chemical equation below is shorthand for the following description? One molecule of methane (CH4) reacts with two molecules of oxygen (O2) to form one molecule of carbon dioxide (CO2) and two molecules of water (H2O):" />
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                        <OTText id="58ed3234-600b-11de-a211-eb594fb6a35a" text="CH4 + O2 --&gt; CO2 + H2O" />
                        <OTText id="58ed3235-600b-11de-a211-eb594fb6a35a" text="2 CH4 + 4 O2 --&gt; 2 CO2 + 4 H2O" />
                        <OTText id="58ed3236-600b-11de-a211-eb594fb6a35a" text="CH4 + 2 O2 --&gt; CO2 + 2 H2O" />
                        <OTText id="58ed5947-600b-11de-a211-eb594fb6a35a" text="CH4 + 2 O2 --&gt; 2 CO2 + 2 H2O" />
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                <OTQuestion id="58ed5948-600b-11de-a211-eb594fb6a35a" name="http://ri-itest.concord.org/SAMActivities/ChemicalReactions/ChemicalReactions_v4/page9.cml">
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                    <OTText id="58ed5949-600b-11de-a211-eb594fb6a35a" text="Aluminum reacts with oxygen to form aluminum oxide, a thin non-reactive coating that prevents aluminum from further rusting. The UNBALANCED chemical equation is: Al + O2 Al2O3. What is the correct BALANCED chemical equation?" />
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                        <OTText id="58ed805b-600b-11de-a211-eb594fb6a35a" text="8 Al + 6 O2 --&gt; 4 Al2O3" />
                        <OTText id="58ed805c-600b-11de-a211-eb594fb6a35a" text="2 Al + 3 O2 --&gt; Al2O3" />
                        <OTText id="58ed805d-600b-11de-a211-eb594fb6a35a" text="4 Al + 3 O2 --&gt; 2 Al2O3" />
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                <OTQuestion id="58eda76e-600b-11de-a211-eb594fb6a35a" name="http://ri-itest.concord.org/SAMActivities/ChemicalReactions/ChemicalReactions_v4/page9.cml">
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                    <OTText id="58eda76f-600b-11de-a211-eb594fb6a35a" text="Some dry powder fire extinguishers contain baking soda and use the following reaction to produce carbon dioxide (CO2), which helps to smother the fire: 2 NaHCO3 Na2CO3 + H2O + CO2. What type of reaction is this?" />
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                    <OTChoice id="58eda770-600b-11de-a211-eb594fb6a35a" selectionUI="0">
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                        <OTText id="58eda771-600b-11de-a211-eb594fb6a35a" text="synthesis" />
                        <OTText id="58eda772-600b-11de-a211-eb594fb6a35a" text="decomposition" />
                        <OTText id="58edce83-600b-11de-a211-eb594fb6a35a" text="single displacement" />
                        <OTText id="58edce84-600b-11de-a211-eb594fb6a35a" text="double displacement" />
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