alleryThe rms speed of N₂ at 300 K (M = 28 g/mol) is approximately (use $R = 8.314$ J/(mol·K)):
A170 m/s
B517 m/s
C1000 m/s
D5170 m/s
Answer & Solution
Correct answer: B. 517 m/s
$v_{rms} = \sqrt{3RT/M_0} = \sqrt{3 \times 8.314 \times 300/0.028} = \sqrt{2.673 \times 10^5} \approx 517$ m/s.
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