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What is the molal humidity of a gas with partial pressure with vapor 1 mm Hg and partial pressure without vapor 1 atm?

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What is the molal humidity of a gas with partial pressure with vapor 1 mm Hg and partial pressure without vapor 1 atm?

(a) 90%

(b) 131%

(c) 214%

(d) 288%

This question was posed to me in an online quiz.

Question is taken from Partial Saturation Terminology topic in section Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering

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The correct choice is (b) 131%

The best I can explain: Molal humidity = 133.3/101.3*100 = 131%.

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