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The temperature of an open room of volum...

The temperature of an open room of volume `30 m^(3)` increases from `17^(@)C to 27^(@)C` due to sunshine. The atmospheric pressure in the room remains `1 xx 10^(5) Pa`. If `n_(i) and n_(f)` are the number of molecules in the room before and after heating then `n_(f)` and `n_(i)` will be

A

`2.5 xx 10 ^(23)`

B

`-1 .16 xx 10 ^(23)`

C

`1. 38 xx 10 ^(23)`

D

` 2.5 xx10^(23)`

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