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//Example number 6.10, Page number 6.50
clc;clear;close
// variable declaration
n=4 // unitless
M=58.5 // Molecular wt. of NaCl
N=6.02*10^26 // Avagadro number
rho=2180 // density
// Calculations
a=((n*M)/(N*rho))^(1/3) // in m
s=a/2 // in m
// Result
printf("a= %.3e m",a)
printf("\nspacing between the nearest neighbouring ions = %.4f nm",(s/10^-9))
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