What is the empirical formula of a following compound if a sample contain 0.0130 mol #C#, 0.0390 mol #H#, and 0.0065 mol #O#?
We divide thru by the smallest molar quantity to write the empirical formula.
So the smallest molar quantity is that of oxgen,
So that's the empirical formula, the simplest whole number ratio that defines constituent atoms in a species. The molecular formula is some whole number multiple of the empirical formula.