Question

b) Calculate the molecular mass of the following:

i) HNO 3 ii) Na2S

H= 1u , N= 14u , O =16u, Na=23u, S=32u​

Answer 1

molecular mass is the sum of mass of individual element

Explanation:

HNO3 = 1+14+3(16) =63 u

NA2 S = 2(23)+32= 78u