Do a demonstration to show that melting ice in water does not cause the mass of the combined water and ice to change. Question to investigate ... Show the animation Conservation of Mass in Physical ...

The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the ...

The total mass stays the same during a chemical reaction. This is the law of conservation of mass. In both examples, the reactants and products stay in the beaker. The total mass of the beaker and ...