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Stoichiometry Mole to Mass

Total questions: 15

Worksheet time: 15mins

Name
Class
Date
1.

For the reaction pictured how many moles of nitrogen gas (N2) are required to produce 18 mol of ammonia (NH3)?

a)

18

b)

9.0

c)

4.5

d)

36

2.

If given the mass of methane (CH4) what can be calculated based on the balanced reaction below?

a)

The mass of the oxygen gas reacting along with the mass of carbon dioxide and water produced.

b)

Only the mass of carbon dioxide produced.

c)

Only the mass of oxygen gas reacting.

d)

Only the mass of ,carbon dioxide and water produced.

3.

Which of the following would be investigated in reaction stoichiometry?

a)

the types of bonds that break and form when acids reacts with metals

b)

the mass of potassium required to produce a known mass of potassium chloride

c)

the amount of energy released in chemical reactions

d)

the mass of hydrogen and oxygen in water

4.

Which of the following cannot be determined from the pictured equation?

a)

Moles of a product produced from a given amount of reactant.

b)

Mass of a product produced from a given amount of reactant.

c)

Number of atoms or molecules produced from a given amount of reactant.

d)

The volume of a liquid produced from a given amount of reactant

5.

Given the pictured equation, how may moles of hydrogen gas (H2) would be produced from 1.00 mole of Zinc (Zn) if there was a 85.0% yield?

a)

.850 mole

b)

.750 mole

c)

1.00 mole

d)

There is no way to determine this answer.

6.

Which is true of the reaction shown below?

a)

Two molecules of Substance Y will be left over when this reaction goes to completion.

b)

Substance Y is the limiting reagent in this reaction.

c)

The addition of more molecules of Substance X will not affect the amount of Substance Z that can be made.

d)

The mole ratio of this reaction is 6:5:6.

7.

What is the correct ratio of nitrogen gas to lithium in the reaction pictured?

a)
b)
c)
d)
8.

If a chemical reaction involving substance A and B stops when substance B is completely used up, then substance B is referred to as the

a)

excess reactant.

b)

limiting reactant.

c)

primary reactant.

d)

primary product.

9.

The coefficients in a chemical equation represent which type of ratio?

a)

mass to mass ratio

b)

mole to mole ratio

c)

mass to mole ratio

d)

mole to mass ratio

10.

Mole ratios are obtained from the

a)

balanced chemical equation

b)

periodic table

c)

molar mass

11.

What is the mole ratio of H2O to H3PO4 in the following chemical equation?   P4O10 + 6 H2O --> 4 H3PO4 

a)

6:4

b)

4:6

c)

1:3

d)

3:1

12.

In the reaction 2 H2 + O2 → 2 H2O what is the mole ratio of oxygen to water

a)

1/2

b)

2/1

c)

3/4

d)

4/3

13.

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

a)

116.89 g/mol

b)

35.45 g/mol

c)

22.99 g/mol

d)

58.44 g/mol

14.

In the reaction @@ ext{C}_3 ext{H}_8 + 5 ext{O}_2 ightarrow 3 ext{CO}_2 + 4 ext{H}_2 ext{O} ,howmanygramsof, how many grams of ext{CO}_2 areproducedwhen44gramsof are produced when 44 grams of ext{C}_3 ext{H}_8 areburned?(Molarmassof are burned? (Molar mass of ext{C}_3 ext{H}_8 =44g/mol, = 44 g/mol, ext{CO}_2@@ = 44 g/mol)

a)

132 grams

b)

88 grams

c)

44 grams

d)

176 grams

15.

If 2 moles of H2\text{H}_2 react with 1 mole of O2\text{O}_2 to form water, what is the mass of water produced? (Molar mass of H2O\text{H}_2\text{O} = 18 g/mol)

a)

18 grams

b)

36 grams

c)

54 grams

d)

72 grams