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Exam Review Sheet #1
Balancing Equations and Simple Stoichiometry

Answers are provided on the second sheet. Please try to do the worksheet without referring to them, because you’ll be expected to know this stuff the first day of school!

Balance the following equations:

1) ___ N2 + ___ F2 ( ___ NF3

2) ___ C6H10 + ___ O2 ( ___ CO2 + ___ H2O

3) ___ HBr + ___ KHCO3 ( ___ H2O + ___ KBr + ___ CO2

4) ___ GaBr3 + ___ Na2SO3 ( ___ Ga2(SO3)3 + ___ NaBr

5) ___ SnO + ___ NF3 ( ___ SnF2 + ___ N2O3

Using the equation from problem 2 above, answer the following questions:

6) If I do this reaction with 35 grams of C6H10 and 45 grams of oxygen, how many grams of carbon dioxide will be formed?

7) If 35 grams of carbon dioxide are actually formed from the reaction in problem 6, what is the percent yield of this reaction?

Exam Review Sheet #1
Balancing Equations and Simple Stoichiometry

Answers are provided on the second sheet. Please try to do the worksheet without referring to them, because you’ll be expected to know this stuff the first day of school!

Balance the following equations:

1) 1 N2 + 3 F2 ( 2 NF3

2) 2 C6H10 + 17 O2 ( 12 CO2 + 10 H2O

3) 1 HBr + 1 KHCO3 ( 1 H2O + 1 KBr + 1 CO2

4) 2 GaBr3 + 3 Na2SO3 ( 1 Ga2(SO3)3 + 6 NaBr

5) 3 SnO + 2 NF3 ( 3 SnF2 + 1 N2O3

Using the equation from problem 2 above, answer the following questions:

6) If I do this reaction with 35 grams of C6H10 and 45 grams of oxygen, how many grams of carbon dioxide will be formed? When you do this calculation for 35 grams of C6H10, you find that 113 grams of CO2 will be formed. When you do the calculation for 45 grams of oxygen, you find that 43.7 grams of CO2 will be formed. Because 43.7 grams is the smaller number, oxygen is the limiting reagent, forming 43.7 grams of product.

7) If 35 grams of carbon dioxide are actually formed from the reaction in problem 6, what is the percent yield of this reaction? 80.1%