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Which has maximum number of molecules?...

Which has maximum number of molecules?

A

`7 gN_(2)`

B

`7 g H_(2)`

C

`16 g NO_(2)`

D

`16 g O_(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
In 7 g nitrogen , number of molecules `=(7.0)/(28) "mol"`
`=0.25xxN_(A)` molecules
where , `N_(A)=` Avogadro number `=6.023xx10^(23)`
in 2 g of `H_(2)=(2.0)/(2)" mol" =1xxN_(A)` molecules
in 16 g of `NO_(2)=(16.0)/(46)" mol" `
" " `0.348xxN_(A)`molecules
In 16 g of `O_(2)=(16)/(32) " mol " =0.5xxN_(A)` molecules
Hence , maximum number of molecules are present in 2 g of `H_(2)`.
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