Free Printable Mole Ratios

1.

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

a)

6.7

b)

2.0

c)

3.0

d)

15.0

2.

2Na + S -->Na₂S
What is the total number of moles of S that reacts when 4.0 moles of Na were completely consumed?

a)

1

b)

2

c)

0.5

d)

4

3.

2Na + S -->Na₂S
What is the total number of moles of Na₂S produced when 8.0 moles of Na were completely consumed?

a)

1

b)

2

c)

0.5

d)

4

4.

H₂+Cl₂-->2HCl
What is the total number of moles of HCl produced when 3 moles of H₂ is completely consumed?

a)

5

b)

2

c)

3

d)

6

5.

H₂+Cl₂-->2HCl
How many moles of Cl₂ is needed to react with 3 moles of H₂?

a)

5

b)

2

c)

3

d)

6

6.

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

a)

15

b)

18

c)

20

d)

24

7.

BALANCED chemical equations tell you the relative amounts or the ratios of reactants and products.

Use the following BALANCED chemical equation to determine the ratio:
$2HgO\ \rightarrow\ 2Hg\ +\ O_2$
What is the ratio of HgO to Hg

a)

2:2

b)

1:1

c)

2:1

d)

1:2

8.

BALANCED chemical equations tell you the relative amounts or the ratios of reactants and products.

Use the following BALANCED chemical equation to determine the ratio:
$2HgO\ \rightarrow\ 2Hg\ +\ O_2$
What is the ratio of HgO to $O_2$

a)

2:2

b)

1:1

c)

2:1

d)

1:2

9.

BALANCED chemical equations tell you the relative amounts or the ratios of reactants and products.

Use the following BALANCED chemical equation to determine the ratio:
$2HgO\ \rightarrow\ 2Hg\ +\ O_2$
What is the ratio of Hg to $O_2$

a)

2:2

b)

1:1

c)

2:1

d)

1:2

10.

BALANCED chemical equations tell you the relative amounts or the ratios of reactants and products.

Use the following BALANCED chemical equation to determine the ratio:
$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
What is the ratio of $NH_3$ to $NO$

a)

4:5

b)

1:1

c)

2:3

d)

4:6

11.

BALANCED chemical equations tell you the relative amounts or the ratios of reactants and products.

Use the following BALANCED chemical equation to determine the ratio:
$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
What is the ratio of $NH_3$ to $N_2$

a)

4:5

b)

1:1

c)

2:3

d)

5:6

12.

BALANCED chemical equations tell you the relative amounts or the ratios of reactants and products.

Use the following BALANCED chemical equation to determine the ratio:
$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
What is the ratio of $N0$ to $N_2$

a)

4:5

b)

1:1

c)

6:5

d)

5:6

13.

Mole Ratios used for conversions are derived from:

a)

the molar mass of the reactants in the balanced chemical equation

b)

the coefficients of the balanced chemical equation

c)

the subscripts of the products in the balanced chemical equation

d)

the group number of each element in the balanced chemical equation

14.

Using the reaction below,

4Al + 3O₂ → 2Al₂O₃

How many moles of aluminum oxide are produced from 6 moles of oxygen?

a)

8 mol

b)

6 mol

c)

4 mol

d)

2 mol

15.

What is a mole ratio?

a)

An animal that burrows underground.

b)

How many moles of reactant are used up in a chemical reaction.

c)

The ratio of a reactant / product to a different one - compared by the number of particles.

d)

The process by which we multiply fractions by using numbers from a chemistry problem.

16.

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

Ethane (C₂H₆) combusts in the above reaction. What is the mole ratio of ethane to oxygen gas?

a)

b)

c)

d)

17.

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

Ethane (C₂H₆) combusts in the above reaction. What is the mole ratio of carbon dioxide to water?

a)

b)

c)

d)

18.

In the equation 2 Al2O3 --> 4 Al + 3 O2, what is the mole ratio of aluminum to oxygen?

a)

10:6

b)

3:4

c)

4:3

d)

2:3

Mole Ratios

Total questions: 18

Worksheet time: 14mins

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