Question

The empirical formula of a compound is $C{H}_2$ and its molecular weight is $84$. The molecular formula of the compound is:

• A. $C_4{H}_8$
• B. $C_6{H}_6$
• C. $C_6{H}_8$
• D. $C_6{H}_{12}$

Answer 1

The correct option is D $C_6{H}_{12}$

Empirical weight $=14$ g

Molecular weight $=84$ g

$x=\frac{84}{14}=6$

$\text{Molecular formula}=(\text{Empirical formula}{)}_x$

$\text{Molecular formula}=C_6{H}_{12}$

Hence, option D is correct.