1.
An ideal gaseous mixture of ethane (C2_2H6_6) and ethene (C2_2H4_4) occupies 28 litre at 1 atm and 273 K. The mixture reacts completely with 128 g O2_2 to produce CO2_2 and H2_2O. Mole fraction of C2_2H6_6 in the mixture is: