Question

Calculate the molar mass of the following: 
(i) \(\text{H}_2\text{O}\) (ii) \(\text{CO}_2\) (iii) \(\text{CH}_4\)

Answer 1

 

Compound	Calculation (using H = 1, C = 12, O = 16 g·mol⁻¹)	Molar Mass (g·mol⁻¹)
(i) H₂O	2 × 1 (H) + 1 × 16 (O) = 2 + 16	18 g·mol⁻¹
(ii) CO₂	1 × 12 (C) + 2 × 16 (O) = 12 + 32	44 g·mol⁻¹
(iii) CH₄	1 × 12 (C) + 4 × 1 (H) = 12 + 4	16 g·mol⁻¹