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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