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clear
//
//
//
//Variable declaration
M=63.5; //atomic weight(gm/mol)
N=6.023*10^23; //avagadro number
r=1.278*10^-8; //atomic radius(cm)
n=4;
//Calculations
m=M/N; //mass(g)
a=4*r/sqrt(2); //lattice constant(cm)
V=a^3; //volume(m^3)
rho=n*m/V; //density of crystal(g/cm^3)
//Result
printf("\n density of crystal is %0.3f gm/cm^3",rho)
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