Problem $12\mathrm{.}1$ from our textbook $($Diffusion of Oxygen through Soil$).$ Consider the diffusion of $O_2$ gas through air in the pores of a column of dry sandy soil. The temperature of the systems is $25C$ and the total pressure of the systems is $1$atm. The soil bed depth is $1m$ and the void fraction is $0\mathrm{.}20.$ The partial pressure of $O_2$ at the top of the column is $0\mathrm{.}23$atm while at the bottom, the partial pressure is $0$atm. A tortuosity of $2$ can be assumed. Calculate the rate of diffusion, in $\frac{g}{m^2}*h$ of $O_2$ in air at steady state. $[$HINT: Due to the tortuous nature of the paths, the diffusivity in air will be reduced by a factor equal to the tortuosity.$]**$The answer is $2\mathrm{.}0367$ g$/$m$^2*$hr$**$ PLEASE DO NOT SUBMIT A SOLUTION IF YOU DO NOT GET THIS ANSWER thank you!