# What quantities must be conserved in all chemical reactions?

Mar 4, 2017

#### Answer:

$\text{Two quantities are CONSERVED absolutely:}$

$\text{(i) MASS; and (ii) CHARGE.}$

#### Explanation:

See this old answer. If you encounter a reaction where mass and charge are not explicitly conserved, then you know that the reaction is not in the race as a representation of physical reality.