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Stoichiometry Review

Total questions: 12

Worksheet time: 1hrs 7mins

Name
Class
Date
1.
Mole ratios are obtained from the
a)
balanced chemical equation
b)
periodic table
c)
molar mass
2.
Balance the following reaction :
 
CaC₂(s)   +   H₂O(l)   -->   C₂H₂(g)   +   Ca(OH)₂(aq)
a)
1,2,2,2
b)
1,2,1,1
c)
2,1,1,1
d)
2,1,2,1
3.

How many moles of H2 are needed to react with 2 moles of N2 according to the reaction?

1 N2 + 3 H2 → 2 NH3

a)

6

b)

2

c)

3

d)

1

4.

How many moles of H2O can be produced if 8 moles of H2 are reacted according to the following reaction?

2 H2 + 1 O2 → 2 H2O

a)

4 moles

b)

8 moles

c)

16 moles

d)

2 moles

5.

If 12.00 moles of NaClO3 react, how many moles of O2 will be produced according to the reaction?

2 NaClO3 → 2 NaCl + 3 O2

a)

12 moles of O2

b)

18 moles of O2

c)

9 moles of O2

d)

6 moles of O2

6.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from  6 moles H2
a)
4 moles Fe
b)
6 moles Fe
c)
9 moles Fe
d)
2 moles Fe
7.

2NH3 → N2 + 3 H2: How many moles of ammonia are required to produce 6 moles of hydrogen?

a)

6

b)

2

c)

4

d)

3

8.

Propane, C3H6, is a common fuel used in heating homes in rural areas. Predict how many moles of CO2 are formed when 3.74 moles of propane are burned according to

C3H6 + 6O2 --> 3CO2 + 6H2O

a)

11.2 moles

b)

7.48 moles

c)

3.74 moles

d)

1.25 moles

9.
2H2  +   O2  →  2H2O
How many moles of oxygen are consumed if 8 moles H2 are used?
a)
2
b)
4
c)
6
d)
8
10.
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
11.
Mg(s) + 2 HCl(aq)  -->  MgCl₂(aq)   + H₂(g)
How many moles of HCl are consumed in the production of 7.5 moles of MgCl₂?
a)
3.8 moles
b)
15 moles
c)
7.5 moles
d)
23 moles
12.
Use the following equation:
NaIO3(aq) + 6HI(aq) --> 3I2(s) + NaI(aq) + 3H2O(l)
How many moles of iodine can be made from 6.55 moles of NaIO3?
a)
4.55 moles I2
b)
23.18 moles I2
c)
19.65 moles I2
d)
34.99 moles I2