Difficult
$A$ gaseous hydrocarbon gives upon combustion $0.72 \ g$ of water and $3.08 \ g$ of $CO_{2}$. The empirical formula of the hydrocarbon is:
- A$C_{2}H_{4}$
- B$C_{3}H_{4}$
- C$C_{6}H_{5}$
- D$C_{7}H_{8}$
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