Calculate the number density and the mean free path for a water molecule that is in the vapor phase above a sample of water boiling at 373.15 K and 1.000 atm. Assume the diameter of a water molecule is 2.65 Å which is a measurement called the "kinetic" diameter. This means it represents the "target" size of the molecule when colliding with other molecules, a logical measurement to be used to calculate the mean free path.

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Q: time

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