The pH\displaystyle \text{pH} scale for acidity is defined by pH=log10[H+]\displaystyle \text{pH}=-{{\log}_{{{10}}}{\left[\text{H}^{+}\right]}} where [H+]\displaystyle {\left[\text{H}^{+}\right]}is the concentration of hydrogen ions measured in moles per liter (M).

A solution has a pH\displaystyle \text{pH} of 12.4.

Calculate the concentration of hydrogen ions in moles per liter (M).

The concentration of hydrogen ions is   moles per liter.