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Iron (II) oxide has a cubic structure an...

Iron (II) oxide has a cubic structure and each unit cell ha side 500 pm. If the density of the oxide is 4 g `cm^(-3)` the no. of oxide ions present in each unit cell is_____. (Molar mass of `FeO=72g" "mol^(-1),N_(A)=6.02xx10^(23)mol^(-1)`).

Text Solution

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The Density is given by `rho=(zxxM)/(a^(3)xxN_(A))`. Therefore, `4=(zxx72)/(500xx500xx500xx10^(-30)xx6.02xx10^(23))implies z=4`
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