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diff --git a/2411/CH7/EX7.3/Ex7_3.sce b/2411/CH7/EX7.3/Ex7_3.sce
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+// Scilab Code Ex7.3: Page-377 (2008)
+clc; clear;
+M = 58.46;    // Gram atomic mass of NaCl, g/mole
+N = 6.023e+023;    // Avogadro's number
+rho = 2.17;    // Density of NaCl, g/cc
+m = M/N;    // Mass of each NaCl molecule, g
+n = rho/m;    // Number of NaCl molecules per unit volume, molecules/cc
+N = 2*n;    // Number of atoms per unit volume, atoms/cc
+a = (1/N)^(1/3);    // Distance between two adjacent atoms in the NaCl, cm
+printf("\nThe distance between two adjacent atoms in the NaCl = %4.2f angstrom", a/1e-008);
+
+// Result
+// The distance between two adjacent atoms in the NaCl = 2.82 angstrom 
+\ No newline at end of file