Question

 In water molecule, hydrogen and oxygen are present in the ratio of ____ by mass *

a) 1:16

b) 1:8

c) 2:1

d) 2:32
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Answer 1

Answer:

c) 2:1

Explanation:

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Answer 2

The ratio of hydrogen and oxygen by mass in water is 1:8. The atomic masses of H and O are 1 g/mol and 16 g/mol respectively. In H

2

O, the ratio of hydrogen and oxygen by mass will be 2:16=1:8.