Question

The empirical formula of a compound is $C{H}_{2}O$. Its molecular weight is $180$. The molecular formula of the compound is

• A. $C_{4}H{O}_4$
• B. $C_5{H}_{10}{O}_5$
• C. $C_3{H}_6{O}_3$
• D. $C_6{H}_{12}{O}_6$

Answer 1

Answer: (D)

Let's find the Molar mass of Carbon $=12$.
Molar mass of Hydrogen $=1$.
Molar mass of Oxygen $=16$.
Mass of $C{H}_{2}O=12+2(1)+16=30$.
Molecular weight of compound given is 180 .
So, the molecular weight is $\frac{180}{30}=6$.
$\Rightarrow$ Molecular formula of compound is $C_6{H}_{12}{O}_6$.