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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 EquationAvogadro's Number
- 2. Multiple ChoiceBalance the following reaction :
CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)1,2,2,21,2,1,12,1,1,12,1,2,1 - 3. Multiple ChoiceWhat is the mole ratio of H2O to H3PO4 in the following chemical equation? P4O10 + 6 H2O --> 4 H3PO46:44:61:33:1
- 4. Multiple ChoiceUsing the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 6 moles H2?4 moles Fe6 moles Fe9 moles Fe2 moles Fe - 5. Multiple Choice2Al + 3H2SO4 -> Al2(SO4)3 + 3H2
How many grams of aluminum sulfate would be formed if 250g H2SO4 completely reacted with aluminum?0.85 g290 g450 g870 g - 6. Multiple ChoiceFor the reaction represented by the equation Cl2 + 2KBr → Br2 + 2KCl, how many grams of potassium chloride can be produced from 356 grams potassium bromide?749 g225 g479 g814 g
- 7. Multiple Choice
A student burns 1.50 mol C3H8 according to the following reaction:
C3H8 + 5O2 → 3CO2 + 4H2O
How many grams of carbon dioxide are produced?
44.0 g
66.1 g
132 g
198 g
- 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 Choice2NaClO3 (s) → 2NaCl (s) + 3O2 (g)
12.00 moles of NaClO3 will produce how many grams of O2?256 g of O2576 g of O2288 g O2 - 10. Multiple ChoiceCl2 + 2KBr → Br2 + 2KCl
How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr)?749 g223 g479 g814 g - 11. Multiple ChoiceThe limiting reactantslows the reaction downis used up firstis the reactant that is left overcontrols the speed of the reaction
- 12. 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.AlCl3Cl2Al
- 13. Multiple ChoiceCH4 + 2H2O --> CO2 + 4H2
What is the limiting reactant when 20g CH4 react with 15g H2O?CH4H2OCO2H2 - 14. Multiple ChoiceFe + S --> FeS
If 7.62g Fe react with 8.67g S, what is the limiting reactant?FeSFeSnone - 15. Multiple ChoiceSO2 + PCl5 --> SOCl2 + POCl3
How much SOCl2 is produced when 16.2g SO2 react with 13.7g PCl5?7.87g30.1g26.4g19.8g - 16. Multiple ChoiceTheoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.1.16%116%85%76% - 17. Multiple ChoiceIn a lab, a scientist calculate he should produce 12.3 grams of product in his experiment. When he is finished collecting his product it weighs 10.1 grams. What is his percent yield?82%0.82%10.1 %100%
- 18. Multiple ChoiceWhen reacting Na with Cl2, we calculated that the theoretical yield should be 12.5 grams. Our actual yield was 13.0 grams. What is the percent yield?100%104%96%1.04
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