Question

Calculate molecular mass of H2 and NH3 ( A + mass ofH= 1u , N =14 u) .

Answer 1

Explanation:

molecular mass of H2=1*2=. 2gm

molecular mass of NH3=14+1*3=17

Answer 2

We will first find the molecular mass of H2 for which we will multiply the atomic mass of Hydrogen with 2: 1*2 = 2.

Then we will find the molecular mass of NH3 ,for which we will first multiply the atomic mass of nitrogen with the atomic mass of hydrogen and then we'll multiply the answer with 3 : 14+1*3 = 17.