Oxygen is diffusing through a non-diffusing gas mixture of methane and hydrogen. The oxygen free-mole fractions of methane and hydrogen are 0.667 and 0.333 respectively. The total pressure is 1 x 10 N/m and the temperature 0 C. The partial pressures of oxygen at two planes 2.0 mm apart is 13,000 and 6,500 N/m? respectively. Calculate the flux of oxygen in the gas mixture in kmol/ms Data: At the given conditions, m? Doz-H, -- 6.99 x 10-5" and Doz-CHA S 1.86 x 10-5 m