An oil-diffusion pump aided by a mechanical forepump can readily produce a “vacuum” with pressure 10 6 torr. Various special vacuum pumps can reduce P to 10^-11 torr. At 25°C, calculate the number of molecules per cm3 in a gas at (a)1 atm; (b) 10^-6 torr; (c) 10^-11 torr.

An oil-diffusion pump aided by a mechanical forepump can readily produce a “vacuum” with pressure 10 6 torr. Various special vacuum pumps can reduce P to 10^-11 torr. At 25°C, calculate the number of molecules per cm3 in a gas at (a)1 atm; (b) 10^-6 torr; (c) 10^-11 torr.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter5: Gases

Section: Chapter Questions

Problem 9RQ

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