Free Printable Mole Ratio

1.

$2HgO\ \rightarrow\ 2Hg\ +\ O_2$
What is the ratio of HgO to Hg?

a)

2:2

b)

1:1

c)

2:1

d)

1:2

2.

$2HgO\ \rightarrow\ 2Hg\ +\ O_2$
What is the ratio of Hg to O₂?

a)

2:2

b)

1:1

c)

2:1

d)

1:2

3.

$2HgO\ \rightarrow\ 2Hg\ +\ O_2$
What is the ratio of HgO to O₂?

a)

2:2

b)

1:1

c)

2:1

d)

1:2

4.

$2HgO\ \rightarrow\ 2Hg\ +\ O_2$
How many moles of O₂ could be produced if you started with 10 moles of HgO?

a)

10 moles of O2

b)

20 moles of O2

c)

5 moles of O2

d)

40 moles of O2

e)

2.5 moles of O2

5.

$2HgO\ \rightarrow\ 2Hg\ +\ O_2$
How many moles of Hg could be produced if you started with 10 moles of HgO?

a)

10 moles of Hg

b)

20 moles of Hg

c)

5 moles of Hg

d)

40 moles of Hg

e)

2.5 moles of Hg

6.

$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
What is the ratio of $H_2O$ to $N_2$ ?

a)

4:5

b)

1:1

c)

6:5

d)

5:6

7.

$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
What is the ratio of $N0$ to $N_2$ ?

a)

4:5

b)

1:1

c)

6:5

d)

5:6

8.

$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
What is the ratio of NH₃ to NO?

a)

4:5

b)

1:1

c)

2:3

d)

4:6

9.

$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
What is the ratio of $NH_3$ to $N_2$ ?

a)

4:5

b)

1:1

c)

2:3

d)

5:6

10.

$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
How many moles of N₂ could be produced if you started with 12 moles of NH₃?

a)

15 moles of N₂

b)

9.6 moles of N₂

c)

240 moles of N₂

d)

3 moles of N₂

e)

2.5 moles of N₂

11.

$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
How many moles of H₂O could be produced if you started with 12 moles of NH₃?

a)

15 moles of H₂O

b)

8 moles of H₂O

c)

18 moles of H₂O

d)

3 moles of H₂O

e)

72 moles of H₂O

12.

$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
How many moles of NO did you start with if you ended with 20 moles of N₂?

a)

4 moles of NO

b)

24 moles of NO

c)

25 moles of NO

d)

16.7 moles of NO

e)

20 moles of NO

13.

$CO_2\ +\ LiOH\ \rightarrow\ Li_2CO_3\ +\ H_2O$
What is the ratio of $H_2O$ to $LiOH$ ?

a)

1:1

b)

1:2

c)

2:2

d)

2:1

14.

$CO_2\ +\ LiOH\ \rightarrow\ Li_2CO_3\ +\ H_2O$
What is the ratio of $H_2O$ to $CO_2$ ?

a)

1:1

b)

1:2

c)

2:2

d)

2:1

15.

$CO_2\ +\ LiOH\ \rightarrow\ Li_2CO_3\ +\ H_2O$
What is the ratio of $CO_2$ to $Li_2CO_3$ ?

a)

1:1

b)

1:2

c)

2:2

d)

2:1

16.

$CO_2\ +\ LiOH\ \rightarrow\ Li_2CO_3\ +\ H_2O$
How many moles of H₂O could be produced if 4 moles of LiOH were given to start with?

a)

4 moles of H₂O

b)

2 moles of H₂O

c)

1 moles of H₂O

d)

8 moles of H₂O

e)

3 moles of H₂O

17.

$CO_2\ +\ LiOH\ \rightarrow\ Li_2CO_3\ +\ H_2O$
How many moles of Li₂CO₃ could be produced if 12 moles of LiOH were given to start with?

a)

24 moles of H₂O

b)

12 moles of H₂O

c)

6 moles of H₂O

d)

2 moles of H₂O

e)

3 moles of H₂O

18.

2HgO→2Hg + O₂
If I decompose 34 moles of HgO, how many moles of oxygen will I produce?

What will the ratio that you use look like in this problem?
$\frac{34\ moles\ HgO}{ }\times\frac{\ \ \ \ \ ?\ \ \ \ }{?}$

a)

$\frac{1mole\ O_2}{2\ mole\ HgO}$

b)

$\frac{2\ mole\ HgO}{1\ mole\ O_2}$

c)

$\frac{2\ mole\ Hg}{1\ mole\ O_2}$

d)

$\frac{1mole\ O_2}{1\ mole\ HgO}$

e)

$\frac{2\ mole\ O_2}{1\ mole\ HgO}$

19.

2HgO→2Hg + O₂
If I decompose 34 moles of HgO, how many moles of Hg will I produce?

What will the ratio that you use look like in this problem?
$\frac{34\ moles\ HgO}{ }\times\frac{\ \ \ \ \ ?\ \ \ \ }{?}$

a)

$\frac{2\ mole\ HgO}{2\ mole\ Hg}$

b)

$\frac{1\ mole\ Hg}{1\ mole\ HgO}$

c)

$\frac{1\ mole\ HgO}{1\ mole\ Hg}$

d)

$\frac{1mole\ O_2}{1\ mole\ HgO}$

e)

$\frac{2\ mole\ O_2}{1\ mole\ HgO}$

20.

$4NH_3+6NO\rightarrow5N_2+6H_2O$
Bacteria will cause ammonia $NH_3$ to react with NO to put nitrogen back in the air, along with water, as part of the nitrogen cycle. If there are 3.56 moles of NO in the soil, how many moles of ammonia are needed to react with it?

$\frac{3.56\ moles\ NO}{ }\times\frac{\ \ \ \ \ ?\ \ \ \ }{?}$

a)

$\frac{\ 6\ mole\ NO}{4\ mole\ NH_3}$

b)

$\frac{2\ mole\ NH_3}{3\ mole\ NO}$

c)

$\frac{6\ mole\ Hg}{5\ mole\ N_2}$

d)

$\frac{3\ mole\ NH_3}{2\ mole\ NO}$

e)

$\frac{\ 3\ mole\ NO}{2\ mole\ NH_3}$

21.

$4NH_3+6NO\rightarrow5N_2+6H_2O$
Bacteria will cause ammonia $NH_3$ to react with NO to put nitrogen back in the air, along with water, as part of the nitrogen cycle. If there are 3.56 moles of NO in the soil, how many moles of water would be produced?

$\frac{3.56\ moles\ NO}{ }\times\frac{\ \ \ \ \ ?\ \ \ \ }{?}$

a)

$\frac{\ 6\ mole\ NO}{4\ mole\ NH_3}$

b)

$\frac{2\ mole\ NH_3}{3\ mole\ NO}$

c)

$\frac{6\ mole\ Hg}{5\ mole\ N_2}$

d)

$\frac{1\ mole\ H_2O}{1\ mole\ NO}$

e)

$\frac{6\ mole\ H_2O}{4\ mole\ NO}$

22.

$4NH_3+6NO\rightarrow5N_2+6H_2O$
How many moles of nitrogen will be produced with 3.56 moles of NO in the soil?

$\frac{3.56\ moles\ NO}{ }\times\frac{\ \ \ \ \ ?\ \ \ \ }{?}$

a)

$\frac{\ 6\ mole\ NO}{6\ mole\ H_2O}$

b)

$\frac{1\ mole\ N_2}{1\ mole\ NO}$

c)

$\frac{1\ mole\ H_2O}{1\ mole\ N_2}$

d)

$\frac{6\ mole\ NO}{5\ mole\ N_2}$

e)

$\frac{5\ mole\ N_2}{6\ mole\ NO}$

23.

What is ratio of blue to orange

a)

3/2

b)

3/5

c)

2/3

d)

2/5

24.

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

25.

What is the mole ratio of Mg to MgCl₂?

Mg + HCl → MgCl₂ + H₂

a)

2 mol Mg/ 1 mol MgCl₂

b)

1 mol Mg/ 2 mol MgCl₂

c)

1 mol Mg/ 1 mol MgCl₂

d)

2 mol Mg/ 2 mol MgCl₂

26.

What is the mole ratio of Ba(OH)₂ to AlPO₄?

AlPO₄ + Ba(OH)₂ → Al(OH)₃ + Ba₃(PO₄)₂

a)

3 mol Ba(OH)₂ / 2 mol AlPO₄

b)

1 mol Ba(OH)₂/ 1 mol AlPO₄

c)

2 mol Ba(OH)₂/ 3 mol AlPO₄

d)

1 mol Ba(OH)₂/ 3 mol AlPO₄

27.

What are the missing coefficients for the unbalanced equation below?

AlPO₄ + Ba(OH)₂ → Al(OH)₃ + Ba₃(PO₄)₂

a)

1,3,2,3

b)

2,3,2,3

c)

3,2,3,1

d)

2,3,2,1

28.

Mg_(s) + HCl_(aq) →MgCl_2(aq) + H_2(g)

The reaction of 2.5 mol of HCl will produce ______ mol of MgCl_2.

a)

2.5

b)

1.25

c)

5.0

d)

1.0

29.

If there are 2 moles of oxygen available, which mole ratio will tells how much water is produced?

C₃H₈ +5O₂ → 3CO₂ + 4H₂O

a)

4 mol H₂O/ 5 mol O₂

b)

5 mol O₂/ 4 mol H₂O

c)

2 mol O₂/ 4 mol H₂O

d)

4 mol O₂/ 2 mol H₂O

30.

If there are 10 moles of propane, C₃H₈, which mole ratio will tells how much oxygen is required for the reaction to take place?

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

a)

1 mol C₃H₈/ 5 mol O₂

b)

5 mol O₂/ 1 mol C₃H₈

c)

5 mol O₂/ 10 mol C₃H₈

d)

10 mol C₃H₈/ 5 mol O₂

31.

Which mole ratio tells how much aluminum oxide is produced from 3 moles of aluminum?

4Al + 3O₂ → 2Al₂O₃

a)

3 mol Al/ 2 mol Al₂O₃

b)

2 mol Al₂O₃/ 4 mol Al

c)

4 mol Al/ 2 mol Al₂O₃

d)

2 mol Al₂O₃/ 3 mol Al

32.

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

33.

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

34.

What can be determined from a balanced chemical equation?

a)

Mole ratio of any two substances in the reaction

b)

Energy released in the reaction.

c)

Electron configuration of all elements in the reaction.

d)

Mechanism involved in the reaction.

35.

What can be determined from a balanced chemical equation?

a)

Mole ratio

b)

number of atoms in a mole

c)

Avogadro's number

d)

22.4 L

Mole Ratio

Total questions: 35

Worksheet time: 18mins

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