Chemistry Examples

The law of conservation of mass states that matter cannot be created nor destroyed. There are no more or less atoms at the end of a chemical reaction than there were at the beginning. To balance a chemical equation, every element must have the same number of atoms on each side of the equation.

${\displaystyle Co}$ is not a balanced element. To balance ${\displaystyle Co}$, multiply ${\displaystyle Co{\left(N{O}_3\right)}_3}$ from the left side by ${\displaystyle 2}$.

${\displaystyle N}$ is not a balanced element. To balance ${\displaystyle N}$, multiply ${\displaystyle N{H}_{4}N{O}_3}$ from the right side by ${\displaystyle 4}$.

${\displaystyle O}$ is not a balanced element. To balance ${\displaystyle O}$, multiply ${\displaystyle Co{\left(N{O}_3\right)}_3}$ from the left side by ${\displaystyle 2}$ and ${\displaystyle 4N{H}_{4}N{O}_3}$ from the right side by ${\displaystyle 6}$.

${\displaystyle N}$ is not a balanced element. To balance ${\displaystyle N}$, multiply ${\displaystyle {\left(N{H}_4\right)}_{2}S}$ from the left side by ${\displaystyle 3}$ and from the right side by ${\displaystyle 2}$.

${\displaystyle H}$ is a balanced element because there is the same number of atoms of ${\displaystyle H}$ in each side of the equation.

${\displaystyle S}$ is a balanced element because there is the same number of atoms of ${\displaystyle S}$ in each side of the equation.