Problem 8: Ammonia gas is diffusing at aconstant rate through a layer of stagnant air 1 mm thick. Conditions are fixed so that the gas contains 50% by volume at one boundary of the stagnant layer. The ammonia diffusing to the other boundary is quickly absorbed and the concentation is negligible at theat plane. The temperature is 295 K and the pressure is 1 atm. Caculate the flux of amonia of that layer.