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Moles and % Composition

Last updated about 7 years ago

20 questions

Note from the author:

Basic mole to grams and grams to mole conversion and percent composition

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Question 1

1.

368 g

184 g

130 g

200 g 

Question 2

2.

4 mol

1 mol 

3 mol 

2 mol 

Question 3

3.

 The molar mas is 103 g

22 % Na 

60 % Br 

40 % Na 

77 % Br

Question 4

4.

0. 5 mol 

1. 2 mol 

0.21 mol 

1 mol 

Question 5

5.

12

110 g

33 g

50 g

Question 6

6.

10 % N 

90 % Mg

50 % N 

74 % Mg 

Question 7

7.

150 g

62 g

200 g

186 g

Question 8

8.

1 mol 

2.4 mol 

1.3 mol 

2 mol 

Question 9

9.

320 g

169 g

69 g

220 g

Question 10

10.

0.2 mol

0. 02 mol

1.2 mol

0.002 mol

Question 11

11.

158 g

123 g

474 g

316 g

Question 12

12.

90 % Cl 

80 % Al 

20 % Cl 

22 % Al 

All wrong 

Question 13

13.

Select all that apply

2 % H

44 % C

Electrons are transferred

This is a molecule 

Electrson are shared 

50 % O 

This is an ionic compund 

Question 14

14.

20 g

40 g

56 g

80 g

Question 15

15.

40 % C

26 % F

molar mas = 94 g/mol

34 % O

This is an ionic compound

Question 16

16.

63 g

32 g

42 g

53 g

Question 17

17.

1 mol 

0.5 mol 

2 mol 

1.5 mol 

Question 18

18.

20 % O

Electrons are shared

This is an ionic compound

6 % C

85 % Br

Question 19

19.

3.2 mol 

1.2 mol 

4.2 mol 

2.2  mol 

Question 20

20.

99 grams

174 g

58 g

29 g