1. In a gas-phase diffusion mass-transfer process, the steady-state flux of species A in a binary

mixture of A and B is 5.0 x 10-5 kgmole A/m²s, and the flux of B is 0 (zero). At the

particular point in the diffusion space, the concentration of species A is 0.005 kgmole/m³ and

the concentration of species B is 0.036 kgmole/m³. Estimate the individual net velocities of

species A and B along the direction of the mass transfer, and the average molar velocity.