co$2($A$)$ diffuses through a stagnent layer of air$($B$)1$ cm thick at a temperature of $298$k and pressure of $1$atm. a$)$ calculate the concentration o A$.$ b$)$ if the molar flux of A is $1\mathrm{.}922*10$ to the power of $-5$ gmol$/$cm square $.$ calculate molar average velocity of the diffusing gas, A$.$ Given R$=82\mathrm{.}1($cm$^3)($atm$)($k$)($gmol$)$