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23-11-2017
Chemistry

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The rms speed of the molecules of a gas at 139°c is 181 m/s. calculate the mass of a single molecule in the gas.

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02-12-2017

Answer: RMS = sqrt 3RT/M R is gas constant in (kgÂ·m 2 /sec 2 )/KÂ·mol; T is temp in K; M is molar mass in kg 181 m/s = sqrt (3)(8.314)(412)/M sqrt M = 0.55 M = 0.298 kg = 298 g

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