EXAMPLE $3\mathrm{.}6($Gas absorption from bubbles$)$ A mixture of $50\%C{O}_2$ and $50\%N_2$ is bubbling through water in a laboratory column at $30C$ and $1$atm. The depth of water in the column is $30cm.$ A single$-$nozzle gas distributor is used. The gas flow rate is $15c{m}^3$ per minute and the bubbles are of $1cm$ diameter on the average. The bubble rise velocity is $20c\frac{m}{s}.$ Calculate the rate of absorption of carbon dioxide. The diffusivity of $C{O}_2$ in water is $2\mathrm{.}19{10}^{-5}c\frac{m^2}{s}.$ Henry's law can be used to calculate the solubility of $C{O}_2$ in water at the given temperature, $p=1860x^{**}(p=$ partial pressure of $C{O}_2,$ in atm; $x^{**}$ is its mole fraction in water at equilibrium$).$ how did you find Cs from henry nw