Photosynthesis, as it occurs in the leaves of a green plant, involves transport of carbon dioxide (C02) from the atmosphere to the chloroplasts of the leaves and the rate of photosynthesis may be quantified in terms of the rate of CO2 assimilation by the chloroplasts. This assimilation is strongly influenced by CO2 transfer through the boundary layer that develops on the leaf surface. Under conditions for which the density of CO2 is 6 X 10-4 kg/m3 in the air and 5 X 104 kg/m3 at the leaf surface and the convection mass transfer coefficient is 10-2 m/s, what is the rate of photosynthesis in tem1S of kilograms of CO2 assimilated per unit time and area of leaf surface?