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 ...

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 the substances it contains stays the same during the ...

Miss Roberts: OK, so we are looking at the conservation ... the mass is conserved. Katie: Wow. That's amazing. That's blown my mind, Miss Roberts. It really has. Here's a couple more examples ...