A sample of compound X is made up of $40.0\%$ carbon, $6.7\%$ hydrogen and $53.3\%$ oxygen by mass. What is the empirical formula for compound X?
- A$\text{CH}_2\text{O}$
- B$\text{C}_2\text{H}_2\text{O}$
- C$\text{C}_2\text{H}_4\text{O}$
- D$\text{CHO}$
Chemistry 9701 · AS & A Level · Atoms, molecules and stoichiometry