There are gas chambers with ammonia-nitrogen mixture at both ends of a 20 cm long tube. If the total pressure is 120 kPa, the temperature is 20 C, and the ammonia in the first chamber has a partial pressure of 20 kPa in the second chamber of 5 kPa, calculate the Ammonia flux according to the equimolar countercurrent diffusion rule. DAB=0.2x104 m/s urgent please