A laboratory with a vapor pressure of 0.20 atm and a diameter of 2 cm at a temperature of 298 K. The liquid benzene (A) in the tube evaporates, and it is dried under 2.0 atm pressure. interferes with the air (B) flow. The liquid phase mass transfer coefficient is ky = 2,5x10-5 kmol/s.m2. Under these conditions, the convective mass transfer flow is one of the following: which one?