Solid StateEasy
Question
How many unit cells are present in a cubeshaped ideal crystal of NaCl of mass 1.00 g?
[Atomic masses: Na = 23, Cl = 35.5]
[Atomic masses: Na = 23, Cl = 35.5]
Options
A.5.14 × 1021 unit cells
B.1.28 × 1021 unit cells
C.1.71 × 1021 unit cells
D.2.57 × 1021 unit cells
Solution
Number of formulas in cube shaped crystals = 
× 6.02 × 1023 since in NaCl type of structure 4 formula units form a cell
∴ unit cells =
= 2.57 × 1021 unit cells.
× 6.02 × 1023 since in NaCl type of structure 4 formula units form a cell∴ unit cells =
= 2.57 × 1021 unit cells.Create a free account to view solution
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