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: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter6: The Gaseous State
Section: Chapter Questions
Problem 6.57QE
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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.
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