A gaseous mixture is composed of 20% CO2, 40% O2 and 40% N2. What is the mass fraction of N2?(a) 0.307(b) 0.416(c) 0.529(d) 0.784I got this question during an interview for a job.I would like to ask this question from Analyses of Multicomponent Solutions and Mixtures topic in chapter Moles, Density & Concentration of Basic Chemical Engineering

A gaseous mixture is composed of 20% CO2, 40% O2 and 40% N2. What is t

1.	A gaseous mixture is composed of 20% CO2, 40% O2 and 40% N2. What is the mass fraction of N2?(a) 0.307(b) 0.416(c) 0.529(d) 0.784I got this question during an interview for a job.I would like to ask this question from Analyses of Multicomponent Solutions and Mixtures topic in chapter Moles, Density & Concentration of Basic Chemical Engineering
Answer» The correct OPTION is (a) 0.307 Best explanation: LET the total moles of the mixture be 100, => mass of CO2 = 2044 = 880 g, mass of ¬O2 = 4016 = 640 g, mass of N2 = 40*14 = 560 g, => mass fraction of N2 = 560/(880 + 640 + 560) = 0.307.

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