Answer
a.
Molecular Formula = $C_{3}H_{8}$
Empirical Formula = $C_{3}H_{8}$
b.
Molecular Formula = $C_{2}H_{2}$
Empirical Formula = $CH$
c.
Molecular Formula = $C_{2}H_{6}$
Empirical Formula = $CH_{3}$
d.
Molecular Formula = $C_{6}H_{6}$
Empirical Formula = $CH$
Work Step by Step
The empirical formula tells us the simplest ratio of atoms in the elements present