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//Example 4_8
clc();
clear;
//To calculate the number of atoms per unit cell
a=2.9*10^-10 //units in meters
M=55.85 //units in kg/m^3
density=7870 //units in kg/m^3
N=6.02*10^26 //units in kg/mol
n=(a^3*density*N)/M
printf("number of atoms %.0f",n)
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