5. the surface area of the lungs is about 75 m2, and the thickness of the alveolar diffusion layer is about 0.5 μm. the po2 in alveolar air is 100 mmhg, while the po2 of venous blood is 40 mmhg. the diffusion coefficient of o2 in water is about 1.5 x 10-5 cm2s-1. the solubility of o2 is given by henry’s law as [o2] = 0.024 po2; here [o2] is expressed in ml o2 at stpd (standard temperature and pressure, dry: 0º c and 1 atm pressure) per ml of water and po2 is in atmospheres. only the dissolved o2 diffuses. what is the initial rate of o2 diffusion from the aggregate alveoli to the blood? (initial rate means to pretend that the venous po2 is clamped at 40 mm hg) give the answer in ml o2 per min and in mol o2 per min using the ideal gas law. assume 37°, r = 0.082 l-atm mol-1 °k-1. remember that 1 atm = 760 mm hg.