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4.0 g of helium occupies 22400 cm^(3) at...

`4.0 g` of helium occupies `22400 cm^(3)` at STP. The specific heat capacity of helium at constant pressure is `( 5.0 cal K^(-1) mol ^(-1))`. Calculate the speed of sound in helium at STP.

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Given that
`C_p = 5.0 cal//mol-k`
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