Question

Calculate the molecular masses of NH3

NCERT Class IX
Sciences - Main Course Book

Chapter 3. Atoms and Molecules

Answer 1

Atomic mass of N = 14 Atomic mass of H = 1 Molecular mass of NH3 = 1×14 + 3×1 = 14 + 3 = 17grams

Answer 2

Atomic Mass of Nitrogen (N) = 14

Atomic Mass of Hydrogen (H) = 1

For NH3,

Substituting the values of N and G

14  +  1 x 3

14  +  3

17