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In a Vacuum System,a Container Is Pumped Down to a Pressure

Question 46

Multiple Choice

In a vacuum system,a container is pumped down to a pressure of 1.33 ×\times 10-6 Pa at 20ºC.How many molecules of gas are there in 1 cm3 of this container? (Boltzmann's constant k = 1.38 ×\times 10-23 J/K)


A) 3.3 ×\times 108
B) 4.8 ×\times 109
C) 3.3 ×\times 1014
D) 7.9 ×\times 1012
E) 4.8 ×\times 1012

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