Question

1)Calculate the molecular mass of
i) H2
ii) Oxygen Gas
iii) HNO3
iv) HCI

2) Calculate the formula unit mass
i) NaCI
ii) CaCI2

Class 9​

Answer 1

Answer:

1 (I) Molecular mass of H2= 2 x Atomic mass of H

= 2 x 1

= 2 u

1 (ii) Molecular mass of O2= 2 x Atomic mass of O

= 2 x 16

= 32 u