The average speed of the molecules of He in a sample is \( 5 / 7 \) to that of the molecules of ...

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The average speed of the molecules of He in a sample is \( 5 / 7 \) to that of the molecules of \( \mathrm{H}_{2} \) in a sample at \( 0^{\circ} \mathrm{C} \). The temperature of Helium sample is :
(A) \( 100^{\circ} \mathrm{C} \)
(B) \( 273^{\circ} \mathrm{C} \)
(C) \( 0 \mathrm{~K} \)
(D) \( 5.6^{\circ} \mathrm{C} \)
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