At a temperature of 300 K

CHEMISTRY · Single correct · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures

Problem

At a temperature of 300 K, the rms speed of atoms of an unknown monatomic gas is measured to be 1.5 times the rms speed of argon atoms at the same temperature. Argon has a molar mass of 40 g/mol. Which value is closest to the molar mass of the unknown gas? (a) 27 g/mol27\ \text{g/mol} (b) 18 g/mol18\ \text{g/mol} (c) 60 g/mol60\ \text{g/mol} (d) 32 g/mol32\ \text{g/mol}

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