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WorksheetsStoichiometry Test
Total questions: 20
Worksheet time: 1hrs 17mins
Name
Class
Date
1.
How many moles are in 16.94g of water?
a)
16.94 mol H2O
b)
0.9401 mol H2O
c)
305.3 mol H2O
d)
1.063 mol H2O
2.
How many moles are in 98.3 g of Aluminum Hydroxide (Al(OH)3)?
a)
2.14 mol
b)
1.26 mol
c)
6.63 mol
d)
5.9 mol
3.
How many grams of carbon are in 0.63 moles of carbon?
a)
3.79x1023 g C
b)
.0524 g C
c)
7.57 g C
d)
.800 g C
4.
What is the molar mass of Hydrogen Peroxide (H2O2)?
a)
48 g/mole
b)
34.02 g/mole
c)
36.5 g/mole
d)
35.5 g/mole
5.
How many moles are in 19.82 g Mg?
a)
1.226mol Mg
b)
481.7mol Mg
c)
1.000mol Mg
d)
0.8156 mol Mg
6.
What is the molar mass of Al2S3?
a)
150.17 g/mol
b)
59.05 g/mol
c)
138.23 g/mol
d)
75.27 g/mol
7.
What is the mass of one mole of AuCl3?
a)
96g
b)
130g
c)
232.5g
d)
303.5g
8.
The ______________ yield is the maximum amount of product possible in a reaction. This determines the amount of product that should be produced in a perfect setting
a)
Percent
b)
actual
c)
stoichiometry
d)
theoretical
9.
Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.
Actual yield = 62g
Calculate the percent yield.
a)
1.16%
b)
116%
c)
85%
d)
76%
10.
What is the formula for percent yield?
a)
theoretical yieldactual yield×100
b)
actual yieldtheoretical yield×100
c)
moles Bmoles A
d)
grams Bgrams A
11.
Calculate percent yield based on the following information:
Actual Yield: 50
Theoretical Yield: 60
a)
0.8333 %
b)
83.33 %
c)
120 %
d)
1.2 %
12.
The limiting reactant
a)
slows the reaction down
b)
is used up first
c)
is the reactant that is left over
d)
controls the speed of the reaction
13.
You 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?
a)
bread
b)
jelly
c)
peanut butter
d)
sandwich
14.
In 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?
a)
82%
b)
0.82%
c)
10.1 %
d)
100%
15.
What is the molar mass of C6H12O6?
a)
180.18 g/mol
b)
180.12 g/mol
c)
180.24 g/mol
d)
180.06 g/mol
16.
For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?
a)
3mol Mg / 2 mol Fe
b)
2 mol Mg/ 3 mol Fe
c)
1 mol Fe/ 2 mol Fe
d)
3 mol MgO / 2 mol Fe
17.
2H2 + O2 → 2H2O
How many moles of oxygen are consumed if 8 moles H2 are used?
How many moles of oxygen are consumed if 8 moles H2 are used?
a)
2
b)
4
c)
6
d)
8
18.
For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?
a)
3mol Mg / 2 mol Fe
b)
2 mol Mg/ 3 mol Fe
c)
1 mol Fe/ 2 mol Fe
d)
3 mol MgO / 2 mol Fe
19.
Mole ratios are obtained from the
a)
balanced chemical equation
b)
periodic table
c)
molar mass
20.
In order to make 1 bike it requires 1 horn, 2 tires, and 1 chain. How many bikes could you make if you had 6 horns, 10 tires, and 7 chains?
a)
6
b)
5
c)
7
d)
10
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