mole 4dThe 3DMakerPro Mole offers 0.05mm hh accuracy 3D scanning at 10 frames per second in a form factor that fits nicely in the palm of your hand. Offered in multiple packages2A+4B 3C+4D. 5 6. Limiting reactant is declared which have lowest ratio of . coefficient. Moles. for reactant. For A: 2. 5 =2.5. For B: 4. 6 =1.5. ⇒B is limiting reagent.