||Balance the element that has the greatest number of atoms
reactant or product, other than oxygen or hydrogen.
||Balance any other elements, other than hydrogen or oxygen.
||Balance oxygen or hydrogen, whichever one is present in
state. Leave until the last whichever one is present in the
||Check that the equation is balanced by counting the number
of each element on each side of the equation.
||The coefficients should be in whole numbers and in their
terms. It is customary to clear any fractions.