The concentration of oxygen in the lungs is about 5.3x'l024 molecules per m3. The oxygen depleted blood entering the pulmonary capillaries has an oxygen concentration of 1.4x1024 moleCUles per m3. The blood is separated from air in the alveoli of the lungs by a 1 micron thick membrane. What is the rate of transfer of oxygen to the blood through the 5x'l0'9 m'2 surface area of one aveolus? Give your answer in molecules per second. The diffusion constant for oxygen in tissue is 2x10'11m2/s