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The root mean square speed of molecules of nitrogen gas at 27ºC is approximately. (Given mass of a nitrogen molecule = 4.6 × 10 –26 kg and take Boltzmann constant k B = 1.4 × 10 –23 JK –1 )

1. 27.4 m/s
2. 91 m/s
3. 1260 m/s
4. 523 m/s

Correct answer: 523 m/s

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