sodium crystallizes in a body-centered cubic unit cell calculate the approximate number of unit cells in 9.2 gram of sodium
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No of atoms per unit cell for bcc(z)=2
No of atoms in 9.2g of Na
=9.2g23gmol−1×6.022×1023atomsmol−1
=2.4088×1023atoms
No of unit cells =2.4088×1023atoms2atomsunitcell−1
=1.2044×103unitcell
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