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

question 52

Multiple Choice

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

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

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