Calculate the molecular mass of chloroform (CHCl3). (Atomic masses: C = 12 u; H = 1 u; Cl = 35.5 u)

Molecular mass of chloroform (CHCl3) = 1 x C + 1 x H + 3 x Cl = (12 + 1 + 106.5)u = 119.5 u

Q48 of 203 Page 129

Calculate the molecular mass of chloroform (CHCl₃). (Atomic masses: C = 12 u; H = 1 u; Cl = 35.5 u)

Molecular mass of chloroform (CHCl₃) = 1 x C + 1 x H + 3 x Cl = (12 + 1 + 106.5)u = 119.5 u

Calculate the molecular mass of ethanoic acid, CH₃ COOH.

(Atomic masses: C = 12 u; H = 1 u; O = 16 u)

Calculate the molecular mass of nitric acid, HNO₃. (Atomic masses: H = 1 u; N = 14 u; O = 16 u)

Calculate the molecular mass of hydrogen bromide (HBr). (Atomic masses: H = 1 u; Br = 80 u)

Calculate the molecular masses of the following compounds:

(a) Hydrogen sulphide, H₂S

(b) Carbon disulphide, CS₂