Answer: Law of Conservation of Mass.
Explanation:
Law of Conservation of Mass states that during a chemical reaction mass neither created nor be destroyed or total mass of the reactants is equal to the total mass of the products in balanced chemical equation.
[tex]CH_4+2O_2\rightarrow CO_2+2H_2O[/tex]
Total mass on the reactant side :
(Mass of one methane molecule + mass of two oxygen molecules)
=[tex](12 amu+4(1 amu))+(2(32 amu))=80 amu[/tex]
Total mass on the product side :
(Mass of one carbon-dioxide molecule + mass of two molecules of water):
=[tex](12 amu+2(16 amu))+(2(18 amu))=80 amu[/tex]
Total mass on the reactant side = Total mass on the product side = 80 u
