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the edge lengh of nacl unit cell is 564 pm what is the density of nacl if its crystalizes in fcc
given
a = 564pm = 564*10-10cm
fcc z= 4
molecular mass of nacl (M)=58.44g/mol
we know that
density D= MZ/NA* a3
D= 588.44 g * 4/ 6.022*1023 * (564 * 10-10)3
DENSITY (D)= 0.216367 g/cm3
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