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Find the average time (in s) required for an oxygen molecule to diffuse through a 0.205 mm thick tear layer on the cornea. (Assume the

Find the average time (in s) required for an oxygen molecule to diffuse through a 0.205 mm thick tear layer on the cornea. (Assume the diffusion constant of oxygen through tears is 2.0 109 m2/s.)

How much time (in h) is required to diffuse 0.510 cm³ of oxygen to the cornea if its surface area is 1.20 cm²?

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