Question

How does the Law of Conservation of Mass apply to chemical reactions?

Answer 1

Well it applies ABSOLUTELY.....and see this old answer.

Explanation:

And so if you start with `10*g` of reactant from ALL sources, AT MOST you can get `10*g` product. And in practice you are not even going to get that, because losses inevitably occur upon handling.

And today we have a particle view of chemical reactivity, which insists that particles themselves have mass, and their combinations and reactions should involve addition of the requisite masses; in all instances, the masses are conserved....