(C) The root mean square $(rms)$ velocity of a gas is given by the formula: $V_{rms} = \sqrt{\frac{3RT}{M}}$ where $R$ is the universal gas constant,$

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Temperature and molecular mass of gas

(C) The root mean square $(rms)$ velocity of a gas is given by the formula: $V_{rms} = \sqrt{\frac{3RT}{M}}$ where $R$ is the universal gas constant,$T$ is the absolute temperature,and $M$ is the molar mass of the gas. Thus,$V_{rms}$ depends on both the temperature $(T)$ and the molar mass $(M)$ of the gas.