Question

The atomic mass of Deuterium, isotope of hydrogen is 2. The atomic mass of oxygen is 16. Then the molecular mass of heavy water formed is
a. 16
b. 18
c. 20
d .24

Answer 1

20.0276 g mol

−

1

Explanation:

Heavy water,  

D

2

O

, is what you get when you replace the hydrogen-1 isotopes,  

1

H

, that are usually present in the vast majority of water molecules, with deuterium, or hydrogen-2 isotopes,  

2

H

.

The difference between hydrogen-1 and deuterium is that the latter contains one proton and one neutron inside its nucleus, as opposed to the former which only contains a proton.

Answer 2

Explanation:

The atomic mass of hydrogen is 1, but due to isotopes , the atomic mass of deuterium is 2 .

The atomic mass of oxygen is 16.

H2O= (2×2)+16

= 20.

I hope it helps you.