It is desired to recover hexane vapor (solute A) from air using an liquid Stripping. The absorption solvent is a nonvolatile mineral oil. In the dilute concentration range, the equilibrium relationship for the dissolution of hexane vapor in the mineral oil at 20C is described by yA = H * xA, where H= 0.15, H is dimensionless, does not depend on pressure. At the present conditions of operation, the hexane partial pressure in the bulk gas stream is 0.015 atm, and the dissolved hexane in the bulk absorption solvent is 5.0 mole%. The total system pressure is 1.50 atm, and the temperature is 20C. The liquid film mass-transfer coefficient kx is 0.01 kgmole/m2 s, and the gas film mass-transfer coefficient ky is 0.02 kgmole/m2 s. a. What is the transfer rate of hexane from the gas phase to the liquid phase?

Do not use A=area, I think that you need use

Kx1=kx1+mky1 NA=Kx(xAxA)