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+//Example 7.11
+clear;
+clc;
+
+//Given
+R=8.314;//gas constant in J K^-1 mol^-1
+T=293;//temperature in K
+w2=2;//weight of the solute in g
+w1=100;//weight of solvent(benzene) in g
+M1=78;//molecular mass of solvent
+p1=74.66;//vapour pressure of pure benzene in mm Hg
+P1=74.01;//vapour pressure of benzene in the mixture in mm Hg
+
+//To determine the molecular weight of the hydrocarbon
+M2=(w2*M1*p1)/(w1*(p1-P1));//molecular weight of the hydrocarbon in g mol^-1
+mprintf('The molecular weight of the hydrocarbon is = %f g mol^-1',M2);
+//end
+\ No newline at end of file