NCERT Class XII Chemistry
Chapter - The Solid State
Questions with Solutions
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Question : 41
Total: 50
A compound forms hexagonal close-packed structure. What is the total number of voids in 0.5 mol of it? How many of these are tetrahedral voids?
Solution:
Number of atoms in 0.5 mol close packing = 0.5 × 6.022 × 10 23 = 3.011 × 10 23
Number of tetrahedral voids = 2 × Number of atoms in the packing= 2 × 3.011 × 10 23 = 6.022 × 10 23
Total number of voids= 3.011 × 10 23 + 6.022 × 10 23 = 9.033 × 10 23
Number of tetrahedral voids = 2 × Number of atoms in the packing
Total number of voids
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