An element with molar mass 27 g `mol^(-1)` forms a cubic unit cell with edge length `4.05 xx 10^(-8)` cm. If its density is `2.7 g cm^(-3)`, what is nature of cubic unit cell ?

An element with molar mass 27 g `mol^(-1)` forms a cubic unit cell wit

1.	An element with molar mass 27 g `mol^(-1)` forms a cubic unit cell with edge length `4.05 xx 10^(-8)` cm. If its density is `2.7 g cm^(-3)`, what is nature of cubic unit cell ?
Answer» Correct Answer - FCC `rho=(ZxxM)/(a^3xxN_A)` or `Z=(rhoxxa^3xxN_A)/M=((2.7 g cm^(-3))(4.05xx10^(-8)cm)^3(6.02xx10^23 mol^(-1)))/(27 g mol^(-1))=4` Hence, it has face-centred cubic unit cell.

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An element with molar mass 27 g `mol^(-1)` forms a cubic unit cell with edge length `4.05 xx 10^(-8)` cm. If its density is `2.7 g cm^(-3)`, what is nature of cubic unit cell ?

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