a/ meaning of stoichiometry

Stoichiometry is the study of relationship between reactions quantity participate in reaction

b/ Procedure for calculations stoichiometry calculation.

i/ Balance the chemical equation
ii/ Find the mole reacted by converting mass or volume into moles.
iii/ Make a mole equivalent
iv/ Convert moles into mass or volume if necessary

c/ Procedure for calculating excess and limiting reagents

i/ Write a balanced chemical equation for the reaction.
ii/ Convert mass or volume into moles.
iii/ Make a mole ratio of reactants (reagents).
iv/ Find or identify limiting and excess reactants.
v/ Calculate the mass or volume of product formed.
vi/ Calculate the mass of excess reagents remain after the reaction.