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Lithium borohydride crystallizes in an o...

Lithium borohydride crystallizes in an orthorhombic system with 4 molecule per unit cell. The unit cell dimensions are `a=6.8Å,b=4.4Å` and `c=7.2Å`. If the molar mass is `21.76`, calculate density of crystal.

A

`0.6708 g// cm ^(3)`

B

`1.6708 g// cm^(-3)`

C

`2.6708 g//cm^(-3)`

D

`16.708 g//cm^(3)`

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The correct Answer is:
A
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