2:15 minutes
Problem 98
Textbook Question

The evaporation of a 120-nm film of n-pentane from a single crystal of aluminum oxide is zero order with a rate constant of 1.92 * 1013 molecules>cm2 # s at 120 K. a. If the initial surface coverage is 8.9 * 1016 molecules>cm2, how long will it take for one-half of the film to evaporate?

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