Question

An. unknown compound has molar mass $ 240\,g/mol $ . Its empirical formula is $ CH_{2}O $ then its molecular formula will be

• A. $ C_{4}H_{8}O_{4} $
• B. $ C_{12}H_{22}O_{12} $
• C. $ C_{6}H_{12}O_{6} $
• D. $ C_{8}H_{16}O_{8} $

Answer 1

Answer: (D)

Empirical formula $= CH _{2} O$
Empirical formula weight $=30 $
$n=\frac{240}{30}=8$
Molecular formula $=\left( CH _{2} O \right)_{8}$
$= C _{8} H _{16} O _{8}$