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Three vessels of equal capacity have gases at the same temperature and pressure. The first vessel contains helium (monoatomic), the second contains fluorine (diatomic) and the third contains sulfur hexafluoride (polyatomic). The correct statement, among the following is:
Detailed Solution
$v_{rms}=\sqrt{\frac{3RT}{M}}$ is independent of the degrees of freedom and depends only on molar mass at a given temperature. Helium has the smallest molar mass, so its rms speed is the largest. (Equal volumes at the same T and P contain equal numbers of molecules.)