Question: Modern vacuum pumps permit the pressures down to p = 4.10-15 atm to be reached at room temperatures. Assuming that the gas exhausted is nitrogen,

Modern vacuum pumps permit the pressures down to p = 4.10-15 atm to be reached at room temperatures. Assuming that the gas exhausted is nitrogen, find the number of its molecules per 1 cm 3 and the mean distance between them at this pressure.

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