Solid StateHard
Question
A molecule A2B (Mw = 166.4) occupies triclinic lattice with a = 5
, b = 8
, and c = 4 
.
If the density of AB2 is 5.2 g cm-3, the number of molecules present in one unit cell is
, b = 8, and c = 4 .If the density of AB2 is 5.2 g cm-3, the number of molecules present in one unit cell is
Options
A.2
B.3
C.4
D.5
Solution
Volume of unit cell = a × b × c = 5 × 10-8 × 8 × 10-8 × 4 × 10-8 = 1.6 × 10-22 cm3
Mass of unit cell = 1.6 × 10-22 × 5.2 = 8.32 × 10-22 g
Number of molecules in one unit cell =
= 3
Mass of unit cell = 1.6 × 10-22 × 5.2 = 8.32 × 10-22 g
Number of molecules in one unit cell =
= 3Create a free account to view solution
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