Principle of atomic conservation
The Principle of Atom Conservation(POAC) states that the total number of atoms of reactants must equal the number of atoms of products.
Explanation:
The POAC comes from the Law of Conservation of Mass.
Mass of atoms of an element in reactant=lmass of atoms of an element in the product
Number of atoms of element in reactants =number of atoms of element in the product
Moles of atoms of element in reactant=lmoles of atoms of element in the product
You do not need a balanced equation to solve a stoichiometry problem by the POAC method.