What is the diffusion flux of acetone across a 15-mm layer of air flowing in the opposite direction at 17C? Acetone concentrations are 19% and 7% by mol. The standard diffusivity is 0.109 cm2/s. (a) At what length from point1 would the mol fraction of acetone be 10%? (b) what is the diffusion rate of acetone in lb/hr.ft2 ?

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