Oxygen Diffusion in the Cornea: The cornea of the mammalian eye can he considered, as a first approximation, to be a membrane 0.05 cm thick. The inside of the cornea is bathed by a dilute salt solution called die aqueous humor. The aqueous humor maintains a small oxygen concentration at the inner corneal surface which we will assume for the purpose of this problem to be zero. The cornea needs oxygen at the constant rate of 8.045 Times 10^-10 mole O_2/cm^2.s. The diffusivity of oxygen in the cornea is 1.08 Times 10^-9 m^2/s. Assume the thickness of the cornea to be much smaller than its area and as such cornea can be treated as a slab. Calculate the concentration of O_2 in mM on the cornea outside surface? Knowing that oxygen is present in air at 21% mole ratio, can we say that the outside surface of cornea and air are at equilibrium? Why? Assume air to be at 1 atm and 25 degree C.