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etymology
stoichiometry comes from the greek roots stoicheion meaning element and metro meaning measure
a way of applying quantitive relationships between the amounts of reactants and products in a chemical reaction
the principal concept to understand is that the amt. of each reactant present at the beginning of a chemical reaction determines how much product can form this main idea falls in line with and is dependent on the conservation of mass law
before performing any stoichiometric calculations we must first make sure that the chemical equation is balanced
1 write the balanced equation for the reaction
2 convert any amounts that are given in grams to moles
3 covert from moles of the given substance to moles of the unknown substance by young the correct mole ratio
4 covert moles of the unknown substance to grams
identify the limiting and excess reactants
p4+o2->p4o10
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