pls solve QUESTION number 8 : 8 Lithium borohydride crystallizes in an orthorhombic system with 4-molecules per - Chemistry - The Solid State

Question

pls solve QUESTION number 8 :

8 Lithium borohydride crystallizes in an orthorhombic system with
4-molecules per unit cell the unit cell of dimension are a=6
8Ao, b=4 4Ao and c=7 2Ao If the
molar mass in 21 54 calculate the density of the crystal

Bharti Paliwal · Accepted Answer

Dear Student

Density = massvolumemass = no
 of molecule per unit cell * molar mass = 4 * 21
546 022 * 1023 = 1
4 * 10-22 g volume = a * b * c = (6
8 * 10-8) * (4
4 * 10-8) * (7
2 * 10-8) = 215
424 * 10-24 cm3⇒ density = 1
4 * 10-22215 424 * 10-24 =  0
664 g/cm3

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pls solve QUESTION number 8..: 8. Lithium borohydride crystallizes in an orthorhombic system with 4-molecules per unit cell the unit cell of dimension are a=6.8Ao, b=4.4Ao and c=7.2Ao. If the molar mass in 21.54 calculate the density of the crystal.

pls solve QUESTION number 8..:

8. Lithium borohydride crystallizes in an orthorhombic system with 4-molecules per unit cell the unit cell of dimension are a=6.8A^o, b=4.4A^o and c=7.2A^o. If the molar mass in 21.54 calculate the density of the crystal.