Question $23(1$ point$)$

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Since the Helium molecule $(He)$ is $2$ times as massive as the Hydrogen molecule $(H_2),$ the speed of sound in Hydrogen is $$ the speed in Helium.

eight times

$\frac{1}{\sqrt[\phantom{2}]{2}},$ times

four times

two times

$\sqrt[\phantom{2}]{2}$ times