Question

Calculate the molecular masses of the following compounds: 

(a) Hydrogen sulphide, H₂S 

(b) Carbon disulphide, CS₂ 

(Atomic masses: H = 1 u, S = 32 u, C = 12 u)

Answer 1

(a).Molecular mass of hydrogen sulphide (H₂S) 

= 2xH + 1xS = (2+32) u = 34u 

(b). Molecular mass of Carbon disulphide (CS₂) = 1xC + 2xS = (12+2 x 32) u = 76 u