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+//Calculate the mass of Oxygen
+
+//Example 2.2
+
+clc;
+
+clear;
+
+PT=758;    //Total partial pressure in torr
+
+PH2O=19.8;   //Partial pressure of water in torr
+
+PO2=(PT-PH2O)*0.00131579;    //Partial pressure of oxygen in torr
+
+V=0.186;   //Volume of oxygen in Litre
+
+M=32;   //Molar mass of oxygen in g/ mol
+
+R=0.08206;  //Gas constant in L atm K^-1 mol^-1
+
+T=295;   //Tempreture in kelvin
+
+m=(PO2*V*M)/(R*T); //Mass of the Oxygen molecule in g
+
+printf("Mass of Oxygen molecule = %.3f g",m);
+