# What is the empirical formula of ethylene glycol?

The molecular formula of ethylene glycol is $H O C {H}_{2} C {H}_{2} O H$, i.e. ${C}_{2} {H}_{6} {O}_{2}$. The empirical formula is ??
So the empirical formula of ethylene glycol is $C {H}_{3} O$; this is the ratio of carbons to hydrogen to oxygen we would find if we tried to determine the composition of the stuff by experiment (i.e. empirically).