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The u(rms) of a gas at 300K is 3R^(1//2)...

The `u_(rms)` of a gas at `300K` is `3R^(1//2)` The molar mass of the gas in `kg mo1^(-1)` is .

A

`1.0 xx 10^(-1)`

B

`1.0 xx 10^(-2)`

C

`1.0 xx 10^(-3)`

D

`1.0`

Text Solution

Verified by Experts

`u_(rms) = sqrt((3RT)/(M))`
`:. 3R^(1//2)=sqrt((3RT)/(M))`
or `M = (3xxR xx 300)/(R xx 3 xx3) = 100g mo1^(-1)`
`=10^(-1) kg mo1^(-1)` .
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