Challenge: The gases x and Y are stored in tank $1$ and $2.$ The tanks are maintained at constant pressure of $2,6\backslash$times $10^(5)$Pa and temperature of $204$K$.$ A uniform tube $(0\mathrm{.}12$m long$)$ connects the tanks. The partial pressure of Y at point $1$ is $0,9\backslash$times $10^(4)$Pa and, at point $2$ is $1\mathrm{.}8\backslash$times $10^(4)$Pa $.$ The diffusivity is $0\mathrm{.}32\backslash$times $10^(-4)($m$^(2))/($s$)$ and R$=8314$m$^(3)$P$($a$)/($K$)$gmol $.$K$.$ a$)$ Calculate the molar flux for x b$)$ Calculate the molar flux for Y