What is the no. Of unit cell in 58.5 gm of NaCl?
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1. Na+ ions are present on all the twelve edge centres and also in centre of the cube.
2.The number of Na+ ions present in one unit cell = 12×1/4 + 1 =4 atoms per unit cell.
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1. Na+ ions are present on all the twelve edge centres and also in centre of the cube.
2.The number of Na+ ions present in one unit cell = 12×1/4 + 1 =4 atoms per unit cell.
3.The number of Cl- ions present in one unit cell = 6×1/2 + 8×1/8 = 4 atoms per unit cell.
4.number of unit cells containing 1.03×10^22 molecules = 1.03×10^22 ÷ 4 = 2.575×10^21 unit cells
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