Hydrogen gas at 17°C and 0.020 atm partial pressure is diffusing through a membrane of 0.7 mm thick polyvinylidene fluoride (PVDF). The pressure of H2 on the other side of the PVDF membrane is zero. Calculate the steady-state flux, assuming that no external resistance to diffusion involved in the membrane. The solubility (S) of H2 gas in the PVDF at 17°C is 0.051 m (at STP of 0°C and 1 atm)/m solid atm and the diffusivity DAB is 1.15 x 10-40 m²/s at 17°C.