Solid StateHard

Question

Lithium borohydride (LiBH4) crystallizes in an orthorhombic system with four molecules per unit cell. The unit cell dimensions are a = 6.0 Å, b = 4.4 Å and c = 7.5 Å. The density of crystals is (Li = 7, B = 11, NA = 6 × 1023)

Options

A.0.74 g/cm3
B.1.48 g/cm3
C.0.37 g/cm3
D.0.90 g/cm3

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