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Q3: Ammonia (A) diffuses through a stagnant layer of air (B), 1.0 cm thickness, at 25 'c and 1.0 atm total pressure. The partial pressures of NH; on the two sides of the air layer are PA=0.9 atm and PAL = 0.1 atm respectively. Air is non diffusing, Calculate: (a) The molar flux of NH3 (b) The velocities of the individual components with respect to a stationary observer (c) The molar and the mass average velocities of the components and (d) The molar flux of NH, with respect to an observer moving with the mass average velocity GIVEN DATA: DAB = 0.214 cm/s