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moles to grams and grams to moles

Total questions: 18

Worksheet time: 44mins

Name
Class
Date
1.

Which has more moles of particles?

a)

12.0 g carbon

b)

6.94 g lithium

c)

10.81 g boron

d)

all have the same number of moles

2.

If the molar mass of magnesium (Mg) is 24.305 g/mol, how many grams are in 5 moles of Mg?

a)

121.525 g

b)

24.305 g

c)

121.5 g

d)

122 g

3.

How many moles is in 25.0 g of calcium?

a)

25.0 moles

b)

0.62 moles

c)

1.60 moles

d)

40.0 moles

4.

Determine the number of moles in 25.0 grams of potassium sulfide (K2S).

a)

0.23 moles

b)

4.41 moles

c)

110.3 moles

d)

25.0 moles

5.

Determine the number of moles in 1.50 grams of copper metal.

a)

1.50 grams

b)

0.023 moles

c)

42.4 moles

d)

6.02x1023

6.

Which weighs more?

a)

1 mole of lithium

b)

1 moles of carbon

c)

1 mole of sodium

d)

1 mole of silicon

7.

What is the mass of 0.25 moles of rubidium bromide (RbBr)?

a)

165.34 g

b)

0.25 g

c)

41.3 g

d)

0.024 g

8.

How many moles are in 30.0 grams of silicon dioxide (SiO2)

a)

60.1 moles

b)

30.0 moles

c)

0.50 moles

d)

2.00 moles

9.

If you had 20.0 g of each of the following, which would have the most moles?

a)

LiCl

b)

NaCl

c)

KCl

d)

RbCl

10.

How many grams does 0.50 moles of silicon dioxide (SiO2) weigh?

a)

2.0 g

b)

0.50 g

c)

60.1 g

d)

30.0 g

11.

What is the molar mass of copper sulfate (CuSO4)?

a)

159.6 g/mole

b)

111.6 g/mol

c)

77.0 g/mol

d)

none of these

12.

What is the mass of 1 mole of Co(NO3)2 cobalt(II) nitrate

a)

182.9 g/mol

b)

168.9 g/mol

c)

88.9 g/mol

d)

134.9 g/mol

e)

238.9 g/mol

13.

How many moles is in 8.40 grams of cobalt(II) nitrate, Co(NO3)2.

a)

182.9 moles

b)

8.40 moles

c)

0.0459moles

d)

21.77 moles

14.

How many grams are in 0.84 moles of cobalt(II) nitrate, Co(NO3)2.

a)

182.9 g

b)

8.40 g

c)

153.6 g

d)

0.00065 g

15.

What is the mass of 0.75 moles of potassium permanganate (KMnO4)?

a)

0.75 g

b)

118.5 g

c)

82.5 g

d)

0.0084 g

16.

How many moles are in 0.75 grams of potassium permanganate (KMnO4)?

a)

0.75 moles

b)

118.5 moles

c)

0.0047 moles

d)

0.0084 moles

17.

How many grams of zinc are in 15.0 grams of zinc sulfide (ZnS)?

a)

65.38g

b)

10.1 g

c)

4.9 g

d)

67.1 g

18.

How many moles of zinc are in 15.0 grams of zinc sulfide (ZnS)?

a)

65.38 moles

b)

10.1 moles

c)

0.15 moles

d)

15.0 moles