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Barium metal crystallizes in a body-cent...

Barium metal crystallizes in a body-centered cubic lattice with barium atoms only at the lattice points. If the density of barium metal is `3.50 g//cm^(3)`, What is the length of the unit cell?

A

`3.19 xx 10^(-8)` cm

B

`4.02 xx 10^(-8)`cm

C

`5.07 xx 10^(-8)` cm

D

`6.39 xx 10^(8)` cm

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