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An element A crystallises in fcc structu...

An element A crystallises in fcc structure. 200 g of this element has `4.12xx10^(24)` atoms. If the density of A is `7.2"g cm"^(-3)`, calculate the edge length of the unit cell.

Text Solution

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The correct Answer is:
`2.786xx 10^(-23) cm^(3)`
`p = ( Z xxm)/(a^(3)xx 10^(-30)) or a = (( Z xxm)/(p xx 10^(-30)))^(1//3) = ( 4xx200 //(4.12 xx10^(24)))/(7.2 xx 10^(-30))"pm" = 299.9 "pm"`
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