Chemistry - Mole Concept Question with Solution | TestHub

Using table of empirical formula for the compound:

Thus, empirical formula is $\left({\mathrm{CH}}_2\right)$, empirical molecular mass = 14
Thus, $\frac{\mathrm{Molecular} \mathrm{Mass}}{\mathrm{Empirical} \mathrm{Mass}} = \mathrm{n}$

$14\times \mathrm{n}=84$

$\mathrm{n}=6$

$\therefore$ Molecular formula ${\mathrm{C}}_6{\mathrm{H}}_{12}$