What are the implications of a chemical equation?
Or
What informations are conveyed by a chemical equation?

A chemical equation gives a lot of information viz.,
1. It tells the names of the reactants and products.
2. It tells the relative number of molecules of reactants and products.
3. It tells the relative number of moles of reactants and the products.
4. It tells the relative weights of reactants and the products.
5. It tells the relative volumes of reacting gases and those of products formed in case of gaseous reactants. For example, the chemical equation.

conveys the following information:
1. Zinc reacts with hydrochloric acid to produce zinc chloride and hydrogen.
2. One atom of zinc reacts with two molecules of hydrogen chloride to produce one molecule of zinc chloride and one molecule of hydrogen.
3. One mole of zinc reacts with two moles of hydrogen chloride to produce one mole of zinc chloride and one mole of hydrogen.
4. 65 gram of zinc reacts with 73 gram of hydrochloric acid to give 136 gram of zinc chloride and 2 gram of hydrogen.
5. 22·4 litres of hydrogen is produced at S.T.P. when one mole of zinc reacts with 2 moles of hydrogen chloride.