Kananjalo, Ii-Moles zingasetyenziselwa ukujonga okokuba zingaphi na ii-molecules kwii-chemical compounds. I-Copper(II) chloride ingumzekelo. i-CuCl2 yi-chemical formula yayo. inye i-copper atom (63.55) zimbini zona ii-chlorine atoms (35.45 · 2 = 70.90). Dibanisa bonke ubunzima be-molar obukwii-elements zidibene kunye nobunzima be-molar be-chemical compound buya busanda. (63.55 + 70.90 = 134.45) Oko kuthatha ukuthi ngee-grams ezingama-134.45 ze-copper(II) chloride, kukho i-mole enye yee-molecules ze-copper(II) chloride. Eli gama lisetyenziswa xa kubalwa okokuba zingaphi na ii-chemicals ezifuneka kwi-chemical reaction xa kungekho ntshukumo reaction (ii-chemicals ezi-reacted) ishiyekileyo. Ukuba kusetyenziswe i-reactant eninzi, kuzakuba ii-reactants ezishiyekileyo kwi-chemical reaction.