Ammonia gas (a) and nitrogen gas (b) are diffusing in counter diffusion through a straight glass tube 2.0 ft (0.610 m) long with an inside diameter of 0.080 ft (24.4 mm) at 298 k and 101.32 kpa. both ends of the tube are connected to large mixed chambers at 101.32 kpa. the partial pressure ofnh3 in one chamber is constant at 20.0 kpa and 6.666 kpa in the other chamber. the diffusivity at' 298 k and 101.32 kpa is 2.30 x 10- 5 m2 /s. (a) calculate the diffusion of nh3, in lb mol/h and kg mol/s. (b) calculate the diffusion n2. (e) calculate the partial pressure at a point 1.0 ft (0.305 m) in the tube and plot pa,pb, and p versus distance z.