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The root mean square velocity of helium ...

The root mean square velocity of helium atoms at normal temperature and pressure is `1300 ms^(-1)`. Calculate (i) density of helium at `0^(@)C` and (ii) mass of helium atom. Normal pressure `= 1.01 xx 10^(5)Nm^(-2)`.

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The correct Answer is:
(i) `0.179 kgm^(-3)`, (ii) `6.64 xx 10^(-27) kg`
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