Calculate the molar mass of the following substances [3 MARKS]
1. Ethyne, C2H2
2. Nitric acid, HNO3
3. Methane, CH4
Each point: 1 Mark
1. Molar mass of ethyne, C2H2= 2 × 12 + 2 × 1 = 26 g
2. Molar mass of nitric acid, HNO3 = 1 + 14 + 3 × 16 = 63 g
3. Molar mass of methane, CH4= 12 + 4 x 1 = 16 g