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- 1. Multiple ChoiceWhat is the first thing you must do to solve a stoichiometry problem?Write a Balanced EquationPanicWrite an Unbalanced EquationAsk for help
- 2. Multiple ChoiceKNO3 --> KNO2 + O2
What coefficients are needed to balance the reaction?2, 2, 12, 3, 21, 2, 21, 3, 1 - 3. Multiple ChoiceO2 + CS2 --> CO2 + SO2
What coefficient would go in front of the O2?1234 - 4. Multiple ChoiceWO3 + H2 --> W + H2O
What coefficient goes in front of H2?1234 - 5. Multiple ChoiceWO3 + H2 --> W + H2O
What coefficient goes in front of H2?1234 - 6. Multiple ChoiceThe equation for Percent Yield:(predicted/experimental) X 100(experimental/predicted) X 100(experimental - predicted)/ Predicted X 100
- 7. Multiple ChoiceTrue or False. You must convert grams to moles to do stoichiometry.TrueFalse
- 8. Multiple Choice2H2 + O2 → 2H2O
How many moles of water can be produced if 8 moles H2 are used?4 moles8 moles16 moles2 moles - 9. Multiple Choice2H2 + O2 → 2H2O
How many moles of oxygen are consumed if 8 moles H2 are used?2468 - 10. Multiple ChoiceWhat is a Limiting Reagent?speeds up a reactionwhat you run out of firstwhat you have left overslows down a reaction
- 11. Multiple ChoiceWhat is a Excess Reagent?amount you end withwhat you run out of firstwhat you have left overwhat you start with
- 12. Multiple ChoiceYou need 2 pieces of bread, 1 tablespoon of peanut butter and 2 tablespoons of jelly to make a sandwich. If you have 10 pieces of bread, 4 tablespoons of peanut butter and 20 tablespoons of jelly, what is the limiting reactant?breadjellypeanut buttersandwich
- 13. Multiple ChoiceFor the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of Mg to moles Fe?3mol Mg / 2 mol Fe2 mol Mg/ 3 mol Fe1 mol Fe/ 2 mol Fe3 mol MgO / 2 mol Fe
- 14. Multiple ChoiceFor the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?3mol Mg / 2 mol Fe2 mol Mg/ 3 mol Fe1 mol Fe/ 2 mol Fe3 mol MgO / 2 mol Fe
- 15. Multiple ChoiceUse the equation 2 Al + 3 Cl2 ---> 2 AlCl3. If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.AlCl3Cl2AlGary Busey
- 16. Multiple ChoiceIf you predicted that 1.5 moles of Magnessium are used in a reaction, and you have 2.0 moles of Magnessium, what type of reactant is Magnessium?Limiting ReactantExcess ReactantFast ReacterNon-Reactant
- 17. Multiple ChoiceIf you predicted that 1.5 moles of Magnesium are used in a reaction, and you have 1.0 mole of Magnesium, how much Magnesium is in Excess?0.5 moles Mg1.5 moles Mg1.0 mole Mg0.0 Moles Mg
- 18. Multiple ChoiceCarbon and Oxygen combine to form CO2. If 10g of Carbon combines with Oxygen to produce 20g of CO2 and 10g of Oxygen combines with Carbon to produce 15g of CO2, How many grams of CO2 are produced from 10g of Carbon and 10g of Oxygen?20g of CO215g of CO217.5g of CO225g of CO2
- 19. Multiple ChoiceWhen does a chemical reaction stop?When the lab is finishedWhen the excess reactant is used upWhen the limiting reactant is used upChemical reactions never stop
- 20. Multiple Choice
The Formula to make S'mores is:
2C + 1M + G2 → C2MG2. If you have 5 Marshmallows (M), 9 Chocolate Pieces (C), and 9 Graham Cracker Halves (G), how many S'mores can you make?54842 - Answer choicesTagsAnswer choicesTags