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Root Mean Square Speed

The root mean...

Question

The root mean square velocity of the molecules in a sample of helium is $\frac{5}{7} t h$ that of the molecules in a sample of hydrogen. If the temperature of hydrogen sample is 0°C, then the temperature of the helium sample is about

A

0°C

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B

0 K

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C

273°C

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D

100°C

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Solution

The correct option is A
0°C

$v = \sqrt{\frac{3 R T}{M}}$

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