1.

Calculate density of nacl its edge length of unit cell is 564pm and molar mass is 58.5

Answer»
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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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