Questions
At 300 K and 1 atm, 15 mL of a gaseous hydrocarbon requires 375 mL air containing 20% 02 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
detailed solution
Correct option is A
Volume of O, present in the given volume of air
Volume of air without
The combustion reaction may be represented as
30mL
Obviously, the reaction is
Thus and
The hydrocarbon is , which theoretically, is not possible.
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