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=6.8overset@A,b=4.4overset@A and c=7.2overset@A`.If the molar mass is 21.76 then the density of crystals is :

`0.6708gcm^-3`

`1.6708gcm^-3`

`2.6708gcm^-3`

None

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