Question

6. Calculate the molar mass of the following substances.

(a) Ethyne, C2H2

(b) Sulphur molecule, S8

(c) Phosphorus molecule, P4 (Atomic mass of phosphorus

= 31)

(d) Hydrochloric acid, HCl

(e) Nitric acid, HNO3​

Answer 1

Answer:

molar mass of ethyne = 26.04g/mole

Answer 2

Answer:

a). ans.= (12×2) + (1×2)=24+2=26 unit

b). ans.= 31×4=124 unit

c). ans.= 1+35.5= 36.5 unit

d). ans.= 1+14+(16×3)=15+48= 63 unit