Question

What do you mean by molecular mass ? Calculate molecular mass of water nitric acid

Answer 1

Molecular mass is the sum of atomic masses of all the atoms present in that molecule.

For HNO3,

H = 1

N = 14

O = 16

Hence, molecular mass of HNO3

= H + N + 3(O)

= 1 + 14 + 3(16)

= 63

Answer 2

it is a substance in the sum of atomic masses of all atoms