Question

calculate the molecular mass of na2o,nh3. (given atomic mass of na=23) *

Answer 1

Explanation:

Molecular mass of Na2O

= 2 × atomic mass of Na (sodium) + 1 × atomic mass of O (Oxygen)

= 2 × 23 + 1 × 16

= 46 + 16

= 62u

Molecular mass of NH3

= 1 × atomic mass of N (Nitrogen)+ 3 × atomic mass of H (Hydrogen)

= 1 × 14 + 3 × 1

= 14 + 3

= 17u

Hope this helps you!!