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Matter Waves

Calculate the...

Question

Calculate the root mean square speed of hydrogen molecules at 373.15K.

7.15 \frac{k m}{s}

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2.15 \frac{k m}{s}

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9.15 \frac{k m}{s}

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3.15 \frac{k m}{s}

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Solution

The correct option is B $2.15 \frac{k m}{s}$
Root mean square velocity is given by

$v_{r m s} = \sqrt{\frac{3 R T}{M}} = \sqrt{\frac{3 (8.314) 373.15}{2 X 10^{- 3}}} \approx 2152 m / s$

Answer is $2.15 k m / s$

Suggest Corrections

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