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The number of molecules present in 3.5 g...

The number of molecules present in 3.5 g of `CO` at `0^(@)c` and 760 nm pressure is

A

`6.02xx10^(23)`

B

`1.25xx6.02xx10^(23)`

C

`0.125xx6.02xx10^(23)`

D

`1.25 N_(A)`

Text Solution

Verified by Experts

The correct Answer is:
c
Molecular weight of `CO=12+16=28`
`therefore 28g` of CO at STP contains `1N_A` molecules then
3.5 g of CO at STP contains `(3.5xx1N_A)/28`
`=0.125 N_A` molecules
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