Or The Law of Conservation of Mass states that during a chemical reaction, mass/matter is not
Because of this law, there must be exactly
the same number and kind of
on each side of a chemical equation. To
check if an equation is balanced or not, simply count the number of atoms of each element on the
reactant side of the equation and check to see if there are the same number of atoms of each
element on the
side of the equation. If so, it is balanced.