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Calculate number of neutrons present in ...

Calculate number of neutrons present in `12 xx 10^25` atoms of oxygen `(8O^17)`: (Given : `N_A=6 xx 10^23`)

A

`1`. 1800

B

`2`. 1600

C

`3`.` 1800` `N_A`

D

`4`. `1600``N_A`

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