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What is the molecular weight of a mixture that contains 25% CO2, 40% O2 and 35% N2?

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What is the molecular weight of a mixture that contains 25% CO2, 40% O2 and 35% N2?

(a) 11.2 g

(b) 22.4 g

(c) 33.6 g

(d) 44.8 g

The question was posed to me in unit test.

The question is from Analyses of Multicomponent Solutions and Mixtures topic in section Moles, Density & Concentration of Basic Chemical Engineering

1 Answer

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Best answer
Correct choice is (c) 33.6 g

Easy explanation: Molecular weight = (25*44 + 40*32 + 35*28)/100 = 33.6 g.

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