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+//Variable declaration:
+//From example 18.19:
+m1 = 144200                     //Mass flow rate of flue gas (lb/h)
+m2 = 541700                     //Mass flow rate of air (lb/h)
+R = 0.73                        //Universal gas constant (psia.ft^3/lbmol. R)
+P = 1                           //Absolute pressure (psia)
+T = 1020                        //Absolute temperature ( R)
+MW = 29                         //Molecular weight of air
+t = 1.5                         //Residence time (s)
+
+//Calculation:
+m = m1+m2                       //Total mass flow rate of the gas (lb/h)
+q = m*R*T/(P*MW)                //Volumetric flow at 560 F (ft^3/h)
+V = q*t/3600                    //Volume of tank (ft^3)
+m = round(m*10**-2)/10**-2
+
+//Result:
+printf("The total mass flow rate of the gas is : %f lb/h .",m)
+printf("The volumetric flow at 560 F is : %.2f  x 10^7 ft^3/h",q/10**7)
+printf("The volume of tank is : %.0f ft^3 .",V)