The rms speed of oxygen molecules is 460 m/s at 0oC. The molecular weight of oxygen is 8 times the molecular weight of helium. The rms speed of helium at 40oC is approximately
A) 3.68 km/s.
B) 1.84 km/s.
C) 1.40 km/s.
D) 880 m/s.
E) 440 m/s.
Correct Answer:
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