Flexi Says: The law of conservation of mass states that during a chemical reaction, the total mass of the products must be equal to the total mass of the reactants. In other words, mass cannot be created or destroyed during a chemical reaction, but is always conserved. The formation of water from hydrogen and oxygen is represented by the chemical equation:
2H2 + O2 → 2H2O.
4g of Hydrogen combines with 32g of oxygen to form 36g of water.
