العلاقة بين عدد الذرات أو الجزيئات و عدد المولات و عدد أفوجادرو (منهاج الكيمياء المستوى الأول – الكلية الجامعية بالجموم)   ما هو عدد أفوجادرو و علاقته بعدد الذرات أو الجزيئات عدد أفوجادر هو عدد الذرات الموجوده في 12 جرامات من الكربون 12، و بالتالي اذا قسمنا وزن 12 جرامات من الكربون 12على وزن ذره

addition reaction or addition any organic chemical reaction involving the combination of two or more substances to form a single product in which there are more groups attached to carbon atoms than there were in the original reactants. Such reactions thus involve a net reduction of bond multiplicity in one of the reactants, as in

active-enzyme centrifugation a technique for determining the sedimentation and diffusion coefficients of an enzyme– substrate complex. A thin lamella of an enzyme solution is layered onto a substrate solution in an ultracentrifuge cell and, on rotation, as the enzyme molecules sediment in a band through the substrate solution they catalyse the enzymic reaction, the progress