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+//example 1

+//Mass and Mole Fractions of a Gas Mixture

+clear

+clc

+m=20 //total mass of the mixture in kg

+mfO2=3/m //mass fraction of oxygen

+mfN2=5/m //mass fraction of nitrogen

+mfCH4=12/m //mass fraction of methane

+NO2=3/32 //no.of kilo moles of oxygen

+NN2=5/28 // no.of kilo moles of nitrogen

+NCH4=12/16 //no.of kilo moles of methane

+N=NO2+NN2+NCH4//total no. of moles

+yO2=NO2/N //mole fraction of O2

+yN2=NN2/N //mole fraction of N2

+yCH4=NCH4/N // mole fraction of CH4

+Mm=m/N //average molar mass of gas in kg/kmol

+printf("\n Mass fraction of oxygen is = %.2f. \n",mfO2);

+printf("\n Mass fraction of Nitrogen is = %.2f. \n",mfN2);

+printf("\n Mass fraction of Methane is = %.2f. \n",mfCH4);

+printf("\n Mole fraction of Nitrogen is = %.3f. \n",yN2);

+printf("\n Mole fraction of Oxygen is = %.3f. \n",yO2);

+printf("\n Mole fraction of Methane is = %.3f. \n",yCH4);

+printf("\n Average Molar mass of gas is = %.1f kg/mol. \n",Mm);
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