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An atomic substance A of molar mass 12 g...

An atomic substance A of molar mass 12 g `mol^(-1)` has a cubic crystal structure with edge length of 300 pm.The no. of atoms present in one unit cell of A is (Nearest integer) Given the density of A is `3.0 g mL^(-1)` and `N_A = 6.02 xx10^23` `mol^(-1)`

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