Molecular Speeds: at What Temperature Would the Root-Mean-Square Speed (Thermal

question 77

Multiple Choice

Molecular speeds: At what temperature would the root-mean-square speed (thermal speed) of oxygen molecules be 13.0 m/s? Assume that oxygen approximates an ideal gas. The mass of one O₂ molecule is 5.312 × 10^-26 kg. The Boltzmann constant is 1.38 × 10^-23 J/K.

• A) 0.217 K
• B) 1800 K
• C) 5410 K
• D) 0.0666 K

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