A Stream Contains A Waste Chemical, W, With A Concentration Of 1 Mol/Liter. To Meet Environmental Protection Agency And State Standards, At Least 90% Of The Chemical Must Be Removed By Reaction. The Chemical Decomposes By A Second-Order Reaction With A Rate Constant Of 1.5 Liter/(Mol Hr). The Stream Flow Rate Is 100 Liter/Hour And Two Available Reactors