# How are the 3 states of matter expressed in a chemical equation?

Feb 23, 2017

(g) for gas, (s) for solid, (l) for liquid

#### Explanation:

In a chemical equation, the three states of matter are expressed as (g) for gas, (s) for solid, and (l) as liquid. They should be written as a subscript after the chemical formula, but that has become less common.

Example:

Two moles of liquid mercury react with oxygen gas to produce two moles of solid mercury (II) oxide.

$\text{2Hg(l) + O"_2("g")}$$\rightarrow$$\text{2HgO(s)}$