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N2 gas is present in one litre flask at ...

`N_2` gas is present in one litre flask at a pressure of `7.6 xx 10^(-10)`mm of Hg. The number of `N_2` gas molecules in the flask at `0^@C` are 

A

`2.68 xx 10^(9)`

B

`2.68 xx 10^(10)`

C

`1.34 xx 10^(28)`

D

`2.68 xx 10^(22)`

Text Solution

Verified by Experts

The correct Answer is:
B
No. of molecules = `nN_0`
`n = (PV)/(RT) = (7.6 xx 10^(10))/(760) xx 1/(0.0821) xx 273` .
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