A liquid$-$phase reaction with stoichiometry $AB$ takes place in a continuous well$-$mixed $10--$lite stiredtank reactor. A schematic diagram of the process is shown below.

The reactor may be considered perfectly mixed, so that the contents are unifom and the concenntation of $A$ in the product stream equals that inside the tank. The tank is initially filled with a solution that contains $2\mathrm{.}00$molAL, and the inlet and outlet flows then begin.