10 ml of gaseous hydrocarbon on combustion gives 40 ml of CO2(g) and 50 ml ofH2O (vap.). The hydrocarbon is
C4H5
C8H10
C4H8
C4H10
CxHyO2⟶CO2+H2O
10ml 40ml 50ml
1mole 4mole 5mole
Apply POAC for C
X =4
Apply POAC for H
Y=10
At 300 K and 1 atm, 15 mL of a gaseous hydrocarbon requries 375 mL air containing 20%O2 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: