The empirical formula and molecular mass of a compound are CH _ 2 O...

As we know that,& the Molar mass of Carbon=12

Molar mass of Hydrogen=1

Molar mass of Oxygen=16

Empirical formula mass $= {CH}_{2}O = 12 + 2 + 1 \times 16 = 30$

Molecular mass $= 180$

$n = \dfrac{ Molccular Mass }{ Empirical formula mass } = \dfrac{100}{30} = 6$

$∵$ Molecular formula $= n \times$ empirical formula

$∴$ Molecular formula $= 6 \times {CH}_{2}O = {C}_{6}{H}_{12}{O}_{6}$