Ammonia gas is diffusing in a stagnant state within nitrogen gas. Since nitrogen gas does not dissolve in ammonia, it does not diffuse within ammonia. The total pressure is 1.013x105 Pa and the temperature is 298 K. The partial pressure of ammonia at point 1 is 1.333x104 Pa, and at point 2, which is 20 mm away from point 1, it is 6.666x103 Pa. Given that the diffusion coefficient (DAB) at 1.013x105 Pa and 298 K is 2.3x10-5 m2/s, calculate: a. The flux of ammonia in kmol/m2.s. b. Assuming that nitrogen gas also diffuses within ammonia (assuming the boundary layers of both gases are permeable), calculate the flux of ammonia in the case of equimolar counter-diffusion. Compare and interpret the results obtained in both cases.