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A binary mixture of oxygen and nitrogen with partial pressures in the ratio 0.21 and 0.79 is contained in a vessel at 300 K. If the total pressure of the mixture is 1 * 10 ^5 N/m^2, find the average molecular weight of the mixture

(a) 28.84

(b) 29.84

(c) 30.84

(d) 31.84

I have been asked this question in class test.

Origin of the question is Concentrations, Velocities and Fluxes in division Modes and Diffusion of Mass Transfer

1 Answer

0 votes
by (39.8k points)
Correct answer is (a) 28.84

To elaborate: (0.21) (32) + (0.79) (28) = 28.84.

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