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Potassium crystallises in a body centred cubic lattice. How many unit cells are present in a 2g potassium?
@ vatsala no of atoms in the unit cell = 2 ( 1 from body center and 1 from cornor ) atomic mass = 39 no of moles = 2/39 no of atoms = 2/39 * Na , where ns is avogadro number = 2/39 * 6.022 * 10 ^ 23 no of unit cell = no of atoms / 2 = 2* 6.022 * 10 ^ 23 / 2* 39 so, the no will comes out to be = 1.54 * 10 ^ 22 which is the answer HOPE IT CLEARS YOUR DOUBT ALL THE BEST ..
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