Free Printable Chemistry Molar Mass

1.

How do we calculate the molar mass of H₂O?

a)

2+16=18

b)

1+16=17

c)

2+32=34

d)

1+31=32

2.

What is the molar mass of CO₂?

a)

12 g/mol

b)

16 g/mol

c)

32 g/mol

d)

44 g/mol

3.

Find the molar mass of KCl

a)

36 g/mol

b)

78 g/mol

c)

74 g/mol

d)

178 g/mol

4.

Find the molar masses of the following compounds: (NH₄)₂CO₃

a)

303.3 g/mole

b)

102.9 g/mole

c)

74.1 g/mole

d)

160.0 g/mole

e)

96.0 g/mole

5.

Find the molar masses of the following compound

C₆H₁₂O₆

a)

303.3 g/mole

b)

102.9 g/mole

c)

180.0 g/mol

d)

160.0 g/mole

e)

96.0 g/mole

6.

How many moles are in 10.7 grams of KNO3?

a)

0.1058mol

b)

1.058x10^-1

c)

1.06x10^-1

d)

2.0x10^1

7.

What is the molar mass when you have 4 moles of CO₂?

a)

176 grams

b)

54 grams

c)

128 grams

d)

280 grams

8.

What would the mass of 2.5 moles of ethanol (C₂H₅OH) be?

(a)

9.

How many moles are in a 20.0 g sample of XY? (3 significant figures, include units)

(a)

10.

How many moles are in a 5.00 g sample of XY?

(a)

11.

Convert 4.13 moles HCl to molecules

a)

2.5x10^24

b)

2.486x10^24

c)

2.49x10^24

d)

2.48626x10^24

12.

How many moles are in 32 grams of Oxygen (O)?

a)

3.0

b)

2.0

c)

1.0

d)

4.0

13.

What is the molar mass of NaCl?

a)

$58.44\,g/mol$

b)

$60.44\,g/mol$

c)

$54.44\,g/mol$

d)

$50.44\,g/mol$

14.

Calculate the molar mass of H_2SO_4.

a)

$98.08\,g/mol$

b)

$100.08\,g/mol$

c)

$96.08\,g/mol$

d)

$102.08\,g/mol$

15.

Which of the following compounds has a molar mass of 18.02 g/mol?

a)

$H_2O$

b)

$CO_2$

c)

$CH_4$

d)

$NH_3$

Chemistry Molar Mass

Total questions: 15

Worksheet time: 15mins

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