A compound is made up of 40.0% carbon, 6.7% hydrogen and 53.3% oxygen only. The relative molecular mass, $M_r$, of the compound is 60. Which row gives the empirical formula and the molecular formula of the compound?
- Aempirical formula $\text{CH}_2\text{O}$; molecular formula $\text{CH}_2\text{O}$
- Bempirical formula $\text{CH}_2\text{O}$; molecular formula $\text{C}_2\text{H}_4\text{O}_2$
- Cempirical formula $\text{C}_3\text{H}_7\text{O}_3$; molecular formula $\text{C}_3\text{H}_7\text{O}_3$
- Dempirical formula $\text{C}_3\text{H}_8\text{O}$; molecular formula $\text{C}_3\text{H}_8\text{O}$