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An element assumes a cubical structure i...

An element assumes a cubical structure in which only `32%` of the space is empty. If the density of the element is `7.2 g//cm^(3)`, the number of atoms present in 100 g of that element is `x xx 10^(24)` where 'x' is
`["volume of the unit cell is "2.39 xx 10^(-23)" cc"]`

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The correct Answer is:
1
BCC packing efficiency `=68%`
`d=(Zm)/(a^(3)N)rArr 7.2 =(2xxm)/(2.39xx10^(-23)xx6xx10^(23)),M=51.624gm`
`51.624gm rarr6xx10^(23),100gm rarr?1.16xx10^(24)`
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