Question

How would you summarize the Law of Conservation of Mass when dealing with a chemical change?

Answer 1

`"Mass is conserved in all chemical reactions.........."`

Explanation:

Is that summary enuff?

And what does it mean? It means that if you start with `10*g` of reactant, from all sources, AT MOST YOU CAN GET `10*g` of product. This conservation is unequivocal and universal in all chemical reactions.

For further detail see here.