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CsBr crystallises in a body- centred cub...

`CsBr` crystallises in a body`-` centred cubic lattice. The unit cell length is `436.6 p m`. Given that `:` the atomic mass of `Cs=133` and that of `Br=80 am u` and Avogadro's number being `6.02xx10^(23)mol^(-1)`, the density of `CsBr` is `:`

A

`42.5g//cm^(3)`

B

`0.425g//cm^(3)`

C

`8.25g//cm^(3)`

D

`4.25g/cm^(3)`

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