Matching Pairs The Mole Matching GameOnline version Match the concepts related to 'The Mole' story and its characters in this fun game! by Globoi Ej 1 Reactants 2 Stoichiometry 3 Avogadro’s number 4 Limiting reagent 5 Products 6 Percent composition 7 Excess reagent 8 Mole ration ratio between the amount of moles of compounds in a chemical reaction reactant that’s not used up in a reaction the determination of proportions which elements react with one another what is formed from a chemical reaction reactant that get used up in a chemical reaction percentage of each element that makes up a specific compound a substance that undergoes change during a reaction 6.02x10^23