Answer:
[tex]{\boxed{\text{13.6 g/mL}}}[/tex]
Explanation:
[tex]\text{Density} = \dfrac{m}{V} = \dfrac{\text{mass}}{\text{volume}}[/tex]
Data:
m = 306.0 g
V = 22.5 mL
Calculation:
[tex]\text{Density} = \dfrac{\text{306.0 g}}{\text{22.5 mL}} = \textbf{13.6 g/mL}\\\text{The density of mercury is {\boxed{\textbf{13.6 g/mL}}}}[/tex]