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+clear;
+clc;
+disp('Example 8.8');
+
+//  aim : To determine
+//  the percentage composition of the gas by volume
+
+//  given values
+CO = 30;// %age mass composition of CO
+N2 = 20;// %age mass composition of N2
+CH4 = 15;// %age mass composition of CH4
+H2 = 25;// %age mass composition of H2
+O2 = 10;// %age mass composition of O2
+
+mCO = 28;// molculer mass of CO
+mN2 = 28;// molculer mass of N2
+mCH4 = 16;// molculer mass of CH4
+mH2 = 2;// molculer mass of H2
+mO2 = 32;// molculer mass of O2
+
+// solution
+vg = CO/mCO+N2/mN2+CH4/mCH4+H2/mH2+O2/mO2;
+v1 = CO/mCO/vg*100;// %age volume composition of CO
+v2 = N2/mN2/vg*100;// %age volume composition of N2
+v3 = CH4/mCH4/vg*100;// %age volume composition of CH4
+v4 = H2/mH2/vg*100;// %age volume composition of H2
+v5 = O2/mO2/vg*100;// %age volume composition of O2
+
+mprintf('\n The percentage composition of CO by volume is  =  %f\n,\nThe percentage composition of N2 by volume is  =  %f\n\nThe percentage composition of CH4 by volume is  =  %f\n\nThe percentage composition of H2 by volume is  =  %f\n\nThe percentage composition of O2by volume is=%f',v1,v2,v3,v4,v5);
+
+// End