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Test Review Stoichometry

Total questions: 19

Worksheet time: 2hrs 34mins

Name
Class
Date
1.
2 KClO3 → 2 KCl + 3 O2
How many moles of oxygen are produced when 6.7 moles of KClO3 decompose completely?
a)
6.7 mol
b)
1.0 mol
c)
10.1 mol
d)
4.5 mol
2.
2Na + 2H2O → 2NaOH+ H2
How many grams of hydrogen are produced if 120 g of Na are available?
a)
5.2 g
b)
2.6 g
c)
690 g
d)
45 g
3.
2 CO (g) + O2(g) → 2 CO2 (g)
In the formation of CO2 from CO and oxygen, how many Liters of CO2 are produced by the reaction of 8 mols of O2 with an excess of carbon monoxide?
a)
0.178 L
b)
358.4 Liters
c)
704 grams
d)
0.36 grams
4.
 SiO2 + 3C → SiC + 2CO
I need to add 8 moles of Carbon to the reaction. How many grams of Carbon should I weigh?
a)
96 g
b)
0.67 g
c)
2.67 g
d)
48 g
5.
B2H6 + 3O2 -->2 HBO2 + 2 H2O
 What mass of O2 will be needed to burn 36.1 g of B2H6?
a)
13.8 g O2
b)
3.86 mol of O2
c)
124 g O2
6.
N2 +  3H2 → 2NH3 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?
a)
6
b)
2
c)
3
d)
1
7.

what is actual yield

a)

a complete product actual product

b)

Chemical reaction is greater than one component

c)

a short reaction

d)

how much is statistically yielded

e)

The relationship of chemicals

8.

what is excess reactant

a)

a complete product actual yield

b)

Chemical reaction is greater than one component

c)

how much is statistically yielded

d)

a short reaction

9.

What is limiting reactant

a)

The substance is completely gone after the reaction has finished

b)

how much is statistically yielded

c)

The relationship of chemicals

d)

The formula to solve the chemistry

10.

percent yield

a)

The substance is completely gone after the reaction has finished

b)

the percentage ratio to the original yield

c)

a relationship taking place in a reaction to form a compound

d)

the amount of product gathered from the original reaction

11.

what is stoichiometry

a)

a relationship taking place in a reaction to form a compound

b)

the amount of product gathered from the original reaction

c)

The substance is completely gone after the reaction has finished

d)

The amount of product solved by the finished reaction

12.

what is theoretical yield

a)

The amount of product solved by the finished reaction

b)

the amount of product gathered from the original reaction

c)

The substance is completely gone after the reaction has finished

d)

The amount of product solved by the finished reaction

13.
CH4  +  2O2  →  CO2  +  2H2O
24 grams of CH4 was added to the above reaction. Calculate the theoretical yield of CO2.
a)
66 grams
b)
132 grams
c)
33 grams
d)
8.72
14.
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
15.

When reacting Na with Cl2, we calculated that the theoretical yield should be 13 grams. Our actual yield was 12.5 grams. What is the percent yield?

a)

90.4%

b)

104%

c)

96.15%

d)

1.04%

16.
Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.
a)
1.16%
b)
116%
c)
85%
d)
76%
17.
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
18.
P+ 3O--> P4O
What is the limiting reactant is 12 moles of Preact with 15 moles of O2?
a)
P4
b)
O2
c)
P4O
d)
none of the above
19.
4NH+ 5O--> 4NO + 6H2O
How many grams of NO are formed if 6.30g of ammonia react with 1.80g of oxygen? 
a)
0.37g
b)
0.045g
c)
1.35g
d)
11.1g