Question

What principle states that mass is neither gained or lost during a chemical reaction?

Answer 1

`"The principle of conservation of mass!"`

Explanation:

`"Conservation of mass!"` is a fundamental, underlying principle of chemistry. In every chemical reaction that has ever been performed, mass is conserved. What does this mean? It means that if you start with 10 g of reactant from all sources, AT MOST you can get 10 g of product. And in practice, you are not even going to get that.

This illustrates the principle of stoichiometry:`"garbage in equals garbage out".`