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

$\text{Mass is conserved in all chemical reactions..........}$
And what does it mean? It means that if you start with $10 \cdot g$ of reactant, from all sources, AT MOST YOU CAN GET $10 \cdot g$ of product. This conservation is unequivocal and universal in all chemical reactions.