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Stoichiometry Mole

Total questions: 10

Worksheet time: 44mins

Name
Class
Date
1.

Using the balanced chemical equation:

Mg + 2 HCl --> MgCl2 + H2


How many grams of MgCl2 is produced if 4.67 moles of HCl react?

a)

219 g MgCl2

b)

4.67 g MgCl2

c)

94 g MgCl2

d)

1 mole MgCl2

2.

Using the balanced chemical equation:

4NH3 + 3O2 --> 2N2 + 6H2O


Determine the amount of grams of N2 is produced if 4.03 moles of NH3 react?

a)

28.0 g N2

b)

56.4 g N2

c)

2.02 g N2

d)

2 moles of N2

3.

Using the balanced chemical equation:

2C4H10 + 13O2 --> 10H2O + 8CO2


Calculate the number of grams of C4H10 needed to produce 5.12 moles of CO2.

a)

58.0 g C4H10

b)

2.56 g C4H10

c)

74.2 g C4H10

d)

2 g of C4H10

4.

Using the balanced chemical equation:

2 Cu + O2 --> 2 CuO


Determine the number of grams of O2 needed to produce 0.7684 moles of CuO.

a)

32.00 g O2

b)

0.3842 g O2

c)

12.29 g O2

d)

64 g of O2

5.

Calculate the molar mass of propane (C3H8).

a)

13 g C3H8 per 1 mole of C3H8

b)

1 mole of C3H8 is 44 g

c)

99 g/mol

d)

22 g per 1 mole of C3H8

6.

Calculate the molar mass of ammonium sulfate - (NH4)2SO4

a)

132 g/mol

b)

130 g/mol

c)

34 g/mol

d)

64 g/mol

7.

Using the balanced equation:

2 HBr + Ca(OH)2 --> H2O + CaBr2


What is the mole ratio between H2O and HBr?

a)

1 mol H2O / 2 mol HBr

b)

2 mol H2O / 1 mol HBr

c)

1 mol H2O / 1 mol HBr

d)

2 mol H2O / 2 mol HBr

8.

Using the balanced chemical equation:

Al2(SO4)3 + 3 BaCl2 --> 2 AlCl3 + 3 BaSO4


What is the mole ratio between aluminum sulfate and aluminum chloride?

a)

1 mol Al2(SO4)3 / 2 mol AlCl3

b)

3 mol Al2(SO4)3 / 2 mol AlCl3

c)

2 mol Al2(SO4)3 / 1 mol AlCl3

d)

2 mol Al2(SO4)3 / 2 mol AlCl3

9.

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

d)

36.1 g of O2

10.
2Na + 2H2O → 2NaOH+ H2
How many grams of hydrogen are produced if 120 g of Na are available?
a)
5.27 g
b)
2.6 g
c)
690 g
d)
45 g