1. It is important to balance equations before doing a stoichiometry problem because the mole ratio is determined based on the of a balanced equation. mole determinants
subscripts
molar mass
coefficients

2. Using the balanced equation below: What is the mole ratio of H2 : O2? *

1 mol H2 : 1 mol H2O
2 mol H2 : 1 mol O2
1 mol H2 : 2 mol H2O
2 mol H2 : 2 mol H2O

3. For the balanced reaction SO3 + H2O → H2SO4, how many grams of SO3 are required to produce 4.00 mol of H2SO4? *

320. g
160. g
240. g
80.0 g

4. In order to work ANY stoichiometry problem you need the following: *

the states of matter in the equations
an actual yield
the molar mass of substances
a correctly written balanced equation

5. In the following reaction, if 15 moles of hydrogen react, how many moles of water will be produced? *

30
7.5
2
15

6. For the reaction Pb(NO3)2 + 2KI → PbI2 + 2KNO3, how many moles of PbI2 are produced from 300 g of 2KI? *

1.00 mol
1.81 mol
3.61 mol
0.903 mol

7. For the reaction 2Na + Cl2 → 2NaCl, how many grams of chlorine gas are required to react completely with 2.00 mol of sodium? *

35.5 g
141.8 g
70.9 g
212.7 g
8. For the reaction 2KlO3 → 2KCl + 3O2, how many moles of KlO3 are required to produce 250 g of oxygen? *

4.3 mol
5.2 mol
4.9 mol
2.0 mol
9. In the following reaction, how many moles of iron would be produced if 10 moles of Aluminum pieces are allowed to completely react?

2 mol Fe
10 mol Fe
40 mol Fe
20 mol Fe
10. You need to make cookies for a school bake sale. In order to make 1 batch of cookies, it requires 2 cups of flour, 3 eggs, and 1 cup of sugar. You need to create as many batches as you can to take to the bake sale. You have the following amount of ingredients at home: 20 eggs, 10 cups of sugar, and 15 cups of flour. Which ingredient is your LIMITING REACTANT? *

Flour
Eggs
Sugar
There's not enough information to determine the answer