# What does the total mass before a chemical reaction equal?

Apr 29, 2017

$\text{The total mass before a chemical reaction............}$

#### Explanation:

$\text{The total mass before a chemical reaction............}$

$\text{is EQUAL to the total mass after a chemical reaction.}$

Mass is conserved in EVERY chemical reaction. This is why educators place such emphasis on $\text{stoichiometry}$, which requires that mass and atoms and molecules are balanced.

See here and here and links.