A mixture of He and N2 gas is contained in a pipe at 298K and 1 atm total pressure which is constant throughout. At one end of the pipe at point 1 the partial pressure pA1 of He is 0.6atm and at the other end 0.2mpA2=0.2atm. Calculate the flux of He at steady state if DAB of the He- N2 mixture is 0.687104m2/s. (Ans: 5.63106kgmol A/(sec.m 2)