A $0\mathrm{.}20-$m$-$long test tube was used to study the diffusion process in which liquid A diffuses into gas B$.$ In one study the level of liquid A was initially $0\mathrm{.}1$ m below the top of the tube. The temperature was $25$o C and the total pressure was maintained at $1$ atm. The molar flux of component A at the top of the test tube was found to be $1\mathrm{.}6$ x $10-3$kmol$/$m$2.$h$.$ Find the diffusion coefficient for A into gas B$.$ Assume that gas B is insoluble in liquid A$.$ The partial pressure of A at the surface of the liquid was $0\mathrm{.}06$ atm