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clear
//
//
//
//Variable declaration
lamda=1.3922; //wavelength(angstrom)
n=1;
theta=14+(27/60)+(26/(60*60)); //glancing angle(degree)
M=58.454; //molecular weight
rho=2163; //density(kg/m^3)
//Calculation
theta=theta*%pi/180; //angle(radian)
d=n*lamda/(2*sin(theta)); //lattice spacing(angstrom)
d_m=d*10^-10; //lattice spacing(m)
N=M/(2*rho*d_m^3); //avagadro number(mol/k-mole)
//Result
printf("\n lattice spacing is %0.4f angstrom",d)
printf("\n avagadro number is %0.4f *10^26 mol/k-mole",N/10^26)
printf("\n answer varies due to rounding off errors")
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