Answer:
[tex]166.6396m/sec[/tex]
Explanation:
Molar mass of helium = [tex]4\times 10^{-3}kg/mole[/tex]
[tex]\gamma[/tex] for helium is 1.67
The velocity of helium in sound at any temperature is given by [tex]v=\sqrt{\frac{\gamma RT}{M}}=\sqrt{\frac{1.67\times 8.314\times 8}{4\times 10^{-3}}}=166.6396m/sec[/tex]
R is a constant 8.314 [tex]atm\ mol^{-1}K^{-1}[/tex]
