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diff --git a/632/CH3/EX3.18/example3_18.sce b/632/CH3/EX3.18/example3_18.sce
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+//clc()
+msolu = 100;//kg
+percent1 = 60;//%
+Dwater = 998;//kg/m^3
+Dalco = 798;//kg/m^3
+Dsolu = 895;//kg/m^3
+Vsolu = msolu/Dsolu;
+malco = msolu * percent1 / 100;
+Valco = malco / Dalco;
+Vpr = Valco * 100 / Vsolu;
+Malco = 46.048;//kg/kmol
+N = malco/Malco;
+Molarity = N/(Vsolu );
+mwater = msolu - malco;
+Molality = N * 1000 /mwater;
+disp("%",Vpr,"(a)Volume percent of ethanol in solution = ")
+disp("mol/L",Molarity,"(b)Molarity = ")
+disp("mol/(kg of water)",Molality,"(c)Molality = ")
+\ No newline at end of file