Q.
An element X (atomic weight - 80 g/mol) having fcc structure, calculate the number of unit cells in 8 g of X:
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a
0.4×NA
b
0.1×NA
c
4×NA
d
NA/40
answer is D.
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Detailed Solution
Effective number of atom in a unit cell = 4 Number of atom =880×NA∴ Number of unit cell =NA10×14=NA40 .
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