Milk has a pH of 6.6. What is the hydrogen concentration $\displaystyle{\left[{H}+\right]}\usepackage{cmbright}\Huge\$ (in moles per liter) of milk?

Use the formula $\displaystyle{p}{H}=-{\log{{\left[{H}+\right]}}}\usepackage{cmbright}\Huge\$ to find $\displaystyle{\left[{H}+\right]}\usepackage{cmbright}\Huge\$ .