Free Printable Stoichiometry Practice

Worksheets

Stoichiometry Practice

Total questions: 25

Worksheet time: 2hrs 36mins

Name

Class

Date

Balance the following reaction:
Mg(s) + HCl(aq) --> MgCl₂(aq) + H₂(g)

1,2,1,2

2,1,1,2

1,2,1,1

1,2,2,2

Balance the following reaction :
CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)

1,2,2,2

1,2,1,1

2,1,1,1

2,1,2,1

Balance the following reaction:
C₂H₂(g) + O₂(g) --> CO₂(g) + H₂O(g)

4,10,2,1

2,5,4,2

1,2,2,1

4,10,2,2

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__Na + __H₂O --> __NaOH + __H₂

2,2 --> 2,1

4,4 --> 4,1

1,2 --> 2,4

1,2 --> 2,1

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CO + __Fe₂O₃--> __Fe + __CO₂

3,1 --> 2,3

3,2 --> 1,1

3,2 --> 2,4

3,2 --> 2,1

Which of the following represent a mole ratio between silver nitrate and copper(II) nitrate in the following reaction:
2AgNO₃ + Cu --> Cu(NO₃)₂ + 2Ag

2 mol AgNO₃ / 2 mol Ag

2 mol Ag / 2 mol AgNO₃

2 mol AgNO₃ / 2 mol Cu(NO₃)₂

2 mol AgNO₃ / 1 mol Cu(NO₃)₂

4NH₃+ 5O₂-->4NO + 6H₂O
What is the total number of moles of H₂O produced when 12 mole of NH₃ is completely consumed?

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

New problem: If 16 moles of carbon dioxide are formed by this reaction, how many moles of water were also produced?

4 mol H₂O

6 mol H₂O

24 mol H₂O

96 mol H₂O

For the following reaction, how many moles of silver is produced, if 10 moles of silver nitrate is completely reacted during the reaction?
2AgNO₃ + Cu --> Cu(NO₃)₂ + 2Ag

2 moles

2.5 moles

5 moles

10 moles

10.

N₂ + 3H₂ --> 2NH₃
How many moles of N₂is needed to react with 6 moles of H₂?

6.7

2.0

3.0

15.0

11.

What is the molar mass of fluorine gas?
(beware!)

18.998 g/mol

38 g/mol

9 g/mol

18 g/mol

12.

What is the molar mass of table salt (NaCl)?

116.886 g/mol

35.453 g/mol

22.990 g/mol

58.443 g/mol

13.

What is the molar mass of AuCl₃?

96 g

130 g

232.5 g

303.3 g

14.

What is the molar mass of CO₂ to the ones place?

15.

Calculate the molar mass of Ba(C₂H₃O₂)₂

255.3 g/mol

237.3 g/mol

228.3 g/mol

196.3 g/mol

16.

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂
How many grams of aluminum sulfate would be formed if 250g H₂SO₄ completely reacted with aluminum?

0.85 g

290 g

450 g

870 g

17.

For the reaction represented by the equation Cl₂ + 2KBr → Br₂ + 2KCl, how many grams of potassium chloride can be produced from 356 grams potassium bromide?

749 g

225 g

479 g

814 g

18.

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O
What mass of O₂ will be needed to burn 36.1 g of B₂H₆?

13.8 g O₂

3.86 mol of O₂

124 g O₂

19.

Using the balanced chemical equation:

Mg + 2 HCl --> MgCl₂ + H₂

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

219 g MgCl₂

4.67 g MgCl₂

94 g MgCl₂

20.

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?

28.0 g N₂

56.4 g N₂

2.02 g N₂

21.

2Na + 2H₂O → 2NaOH+ H₂
How many grams of hydrogen are produced if 120 g of Na are available?

5.2 g

2.6 g

690 g

45 g

22.

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O
What mass of O₂ will be needed to burn 36.1 g of B₂H₆?

13.8 g O₂

3.86 mol of O₂

124 g O₂

23.

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?

90.4%

104%

96.15%

1.04%

24.

Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.

1.16%

116%

85%

76%

25.

If 5.2 grams of Mn(SO₄)₂ are actually formed in the lab, what is the percent yield?

The calculated number of grams for Mn(SO₄)₂ is 6.30 grams

37%

48%

53%

83%

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Stoichiometry Practice

Total questions: 25

Worksheet time: 2hrs 36mins

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