The Mean Free Path of an Oxygen Molecule Is 2

question 38

Multiple Choice

The mean free path of an oxygen molecule is 2.0 × 10-5 m, when the gas is at a pressure of 120 Pa and a temperature of 275 K. The atomic mass of oxygen is 16.0 g/mol, the Boltzmann constant is 1.38 × 10^-23 J/K, Avogadro's number is 6.02 × 10²³ molecules/mole, and the ideal gas constant is J/mol•K = 0.0821 L ∙ atm/mol ∙ K. The radius of an oxygen molecule is closest to

• A) 0.22 nm.
• B) 0.24 nm.
• C) 0.26 nm.
• D) 0.28 nm.
• E) 0.30 nm.

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