56g of Oxygen combined with 22g of hydrogen to give 98g of water. Which law does this reaction does not obey?

2 moles of hydrogen combine to form water with 1 mole of oxygen. As per the above equation, the mass of reactants is not equal to the product and the reaction cannot produce 98g of water. The mass ratio of hydrogen and oxygen must be 1:8 to form water. So, it disobeys both the Law of conservation of mass and the Law of constant proportion.