Free Printable Molar mass & counting atoms

Free Printable Worksheets

Worksheets

Molar mass & counting atoms

Total questions: 12

Worksheet time: 59mins

Name

Class

Date

1.

What is Avogadro's number?

a)

6.02 x 10²³

b)

1 mole

c)

600 million

d)

6.02

2.

How many moles is 6.02 x 10²³ molecules of H₂O?

a)

1 mole

b)

2 moles

c)

6.02 moles

d)

602000000000000000000000 moles

3.

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

4.

What is the molar mass of CO₂?

a)

12 g/mol

b)

16 g/mol

c)

32 g/mol

d)

44 g/mol

5.

Find the molar mass of KCl

a)

36 g/mol

b)

78 g/mol

c)

74 g/mol

d)

178 g/mol

6.

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

7.

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

8.

What is the mass of one mole of (He) Helium?

a)

4 g

b)

2 g

c)

8 g

d)

There is no way to know

9.

C₃H₅(NO₃)₃

a)

C = 3, H = 5, N = 3, O = 9

b)

C = 3, H = 5, N = 1, O = 9

c)

C = 9, H = 15, N = 3, O = 9

d)

C = 9, H = 15, N = 1, O = 3

10.

H₂SO₄

a)

H = 2, S = 4, O = 4

b)

H = 2, S = 1, O = 4

c)

H = 8, S = 4, O = 4

d)

H = 2, SO = 4

11.

Calculate the molar mass of NH₄NO₂

a)

50 g/mol

b)

60 g/mol

c)

64 g/mol

d)

78 g/mol

12.

What is the mass of one mole of aluminum?

a)

27 g

b)

13 g

c)

54 g

d)

14 g

100 %

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