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What will be the root mean square speed ...

What will be the root mean square speed of helium at `40^(@) C`, if root mean square speed of oxygen molecule at `0^(@) C` is `460 m//s` ? Molecular weight of oxygen is `32 g//"mole"` and of helium is ` 4 g//"mole"`.

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The correct Answer is:
`1394 ms^(-1)`
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