Two bulbs are connected by a straight tube, 0.002 m in diameter and 0.3 m in length. Initially the bulb at point 1 contains N2 and the bulb at point 2 contains H2. The temperature and pressure are maintained constant at 25 C and 1 atm. The partial pressure of N2 gas at point 1 of the tube is 0.90 atm and at point 2 is 0.30 atm. If the diffusion coefficient is 0.784 cm2 /s, determine:

(i) The diffusion rate of N2 gas in kg mol/s for equimolar counterdiffusion. (4 marks)

(ii) The velocity of N2 gas relative to stationary point (m/s) at point 2. (6 marks)