A compound isolated from oil of mint has a characteristic cool, refreshing odour. It is frequently used in cough drops to ease the pain of a sore throat. This compound contains only C, H, and O. If 95.6 mg of this compound burns completely in O2, and yields 269 mg of CO2 and 111 mg of H2O, find the empirical formula of the compound.

Question

Compound + O2(g) --> CO2(g) + H2O(g)

Answer 1

mg C = 269 x (12/44) = ?
mg H = 111 x (2/18) = ?
mg O = 95.6 - g C - g o = ?

Then convert mg to g and to mols.
Find the ratio of the mols to one another with the smallest being 1.00. The easy way to do that is to divide the smallest number by itself, then divide the other numbers by the same small number. That will give yhou the empirical formula.