What is the root-mean-square velocity of helium atoms at 27 ° C? The molar mass of helium is 0.004 kg / mol.

decision
V = √ ((3 * 1.38 * 10 ^ 23 * 300 * 6.02 * 10 ^ 23) / (4 * 10 ^ -3)) = 1367 m / s.

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