Question

A molecule of an organic compound contains eight atoms of hydrogen. Its empirical formula contains two atoms of carbon , four atoms of hydrogen and one atom of oxygen[C2H4O]. What is its molecular weight ? (Write only the value of the answer - DO NOT write units ) .?*

Answer 1

Dear student,

The empirical formula of the compound = C₂H₄O
According to the question, the molecular formula of the compound contains 8 atoms of hydrogen which means it is twice the empirical formula.

Hence, the molecular formula is = C₄H₈O₂

Molecular weight of the compound = $4\times 12+\hspace{0.17em}8\times 1+\hspace{0.17em}16\times 2$ = 88 g/ mol

Regards