A mixture of ethane and ethene occupies 40 litre at 1.00 atm and at 400 K. The mixture reacts completely with 130 g of to produce and . Assuming ideal gas behavior, calculate the mole fraction of and in the mixture.

This question uses concentration terms, stoichiometry and limiting reagent, gaseous state & mole concept. Write the definition formula for the concentration term, substitute the given values, and solve for the unknown; the numerical value obtained corresponds to option A.