alleryFind v_rms of O₂ at 300 K (M = 32 g/mol, R = 8.314):
A1500 m/s
B483 m/s (= sqrt(3 × 8.314 × 300 / 0.032))
C50 m/s
D100 m/s
Answer & Solution
Correct answer: B. 483 m/s (= sqrt(3 × 8.314 × 300 / 0.032))
v_rms = sqrt(3RT/M) = sqrt(3 × 8.314 × 300 / 0.032) = sqrt(2.34 × 10⁵) ≈ 483 m/s.
About 1.4 × speed of sound in air.
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