The mass fractions of a three-component gas mixture are: 20% Ar. 50% He and 30% N2. What are the corresponding mole fractions of the components of the gas mixture? [Hint: Assume total mass of gas mixture is 100 kg.] Select one: 75.5% He: 16.9% N2 78.8% He: 13.0% N2 88.8% He 7.6% N2 C 48.8% He 44.6% N2 66.6% He :20.8% N2 A. 7.6% Ar B. 8.2% Ar C. 3.6% Ar: D. 6.6% Ar ; E. 12.6% Ar