A mixture of gases SO2, O2 and 4 g of N2 and total mass of mixture is 10 g, what is the sum of mole fraction of SO2 and O2?(a) 0.25(b) 0.5(c) 0.75(d) 1I got this question during an interview.The query is from Mole Fraction and Mass(Weight) Fraction in division Moles, Density & Concentration of Basic Chemical Engineering

A mixture of gases SO2, O2 and 4 g of N2 and total mass of mixture is

1.	A mixture of gases SO2, O2 and 4 g of N2 and total mass of mixture is 10 g, what is the sum of mole fraction of SO2 and O2?(a) 0.25(b) 0.5(c) 0.75(d) 1I got this question during an interview.The query is from Mole Fraction and Mass(Weight) Fraction in division Moles, Density & Concentration of Basic Chemical Engineering
Answer» The correct CHOICE is (c) 0.75 For explanation I would say: Sum of the mole FRACTION of all GASES = 1, => sum of mole fraction of SO2 and O2 = 1 – 4/10 = 0.75.

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