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1. stoichiometry - (chemistry) the relation between the quantities of substances that take part in a reaction or form a compound (typically a ratio of whole integers).
Go back and review them if you need to, because if you can't do that stuff, you can't do stoichiometry. The Steps Involved in Solving Mass-Mass Stoichiometry Problems. 1  Make sure the chemical equation is correctly balanced. 2  Using the molar mass of the given substance, convert the mass given in the problem to moles.