Calculate the molar mass of the following substances:
(a) Ethyne, C2H2
→ Molar mass of ethyne, C2H2 = 2 × 12 + 2 × 1 = 26 g
(b) Sulphur molecule, S8
→Molar mass of sulphur molecule, S8 = 8 × 32 = 256 g
(c) Phosphorus molecule, P4 (atomic mass of phosphorus = 31)
→ Molar mass of phosphorus molecule, P4 = 4 × 31 = 124 g
(d) Hydrochloric acid, HCl
→ Molar mass of hydrochloric acid, HCl = 1 + 35.5 = 36.5 g
(e) Nitric acid, HNO3
→ Molar mass of nitric acid, HNO3 = 1 + 14 + 3 × 16 = 63 g
