At 300 K and 1 atm, 15 mL of a gaseous h...

At `300 K` and `1 atm, 15 mL` of a gaseous hydrocarbon requires `375 mL` air containing `20% O_(2)` by volume for complete combustion. After combustion, the gases occupy `330 mL`. Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure, the formula of the hydrocarbon is

`C_(4)H_(10)`

`C_(4)H_(8)`

`C_(3)H_(8)`

`C_(3)H_(6)`

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