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Ferrous oxide has a cubic structure and ...

Ferrous oxide has a cubic structure and rach edge of the unit cell is `5.0Å` Assuming density of the oxide as `4.09` g `cm^(-3)` the number of `Fe^(2+)` and `O^(2-)` ions present in each unit cell will be

Text Solution

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The correct Answer is:
4
`z=(rhotimesa^(3)timesNo)/M`
`=((4" g "cm^(-3))(5times10^(-8))(6.02times10^(23)"mol"^(-1)))/(72" g "mol^(-1))`
=4
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