(3) Consider a liquid-phase reaction 2A 3B in a CSTR (no change in volumetric flow rate). No B is entering the reactor, and the concentration of B in the exit stream is 12 mole/dm?. If the conversion of A is calculated to be 80%, what is the concentration of A in the inlet stream? Answer: (A) 10 mole/dm3; (B) 12 mole/dm; (C) 15 mole/dm3; (D) 22.5 mole/dm; (E) None of the above