1.

A solid compound contains X,Y and Z atoms in a cubic lattice with X atoms occupying the corners. Y atoms in the body centered positions and Z atoms at the centres of faces of the unit cell. What is the empirical formula of the compound.

Answer»

`XY_(2)Z_(1)`
`XYZ_(3)`
`X_(2)Y_(2)Z_(3)`
`X_(8)YZ_(6)`

Solution :Atoms of X PER UNIT cell `=8xx(1)/(8)=1`
Atoms of Y per unit cell `=1`
Atoms of Z per unit cell `=6xx(1)/(2)=3`
Hence the formula is `XYZ_(3)`.


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