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Copper crystallises into a fcc lattice with edge length 3.61 xx 10^(-8) cm. Show that the calculated density is in agreement with its measured value of 8.92 "g cm"^(-3). |
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Answer» Solution :Number of atoms per unit cell (Z) = 4 EDGE LENGTH (a) `= 3.61 xx 10^(-8)`cm By formula , `d = (Z xx M)/(a^3 xx N_A)` `therefore d = (4 xx 63.54)/(6.022 xx 10^(23) xx (3.61 xx 10^(-8))^3)` `therefored = 8.97 "g cm"^(-3)`. |
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