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clear
//
//
//
//Variable declaration
w=23+35.5 //molecular weight of NaCl(gm/mole)
N=6.023*10**23 //avagadro number(gm/mol)
rho=2.18 //density of NaCl(gm/cm**3)
n=2 //number of atoms
//Calculation
m=w/N //mass of NaCl(gm)
nm=rho/m //number of molecules(mole/cm**3)
N_NaCl=n*nm //number of atoms per unit volume(atoms/cm**3)
a=(1/N_NaCl)**(1/3) //distance between adjacent atoms(cm)
//Result
printf("\n number of atoms per unit volume is %0.2f *10**22 atoms/cm**3",N_NaCl/10**22)
printf("\n distance between adjacent atoms is %0.2f angstrom",a*10**8)
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