Answer:Here's how to calculate the density of mercury: 1. Understand Density Density is a measure of how much mass is contained in a given volume. It's calculated using the formula: Density = Mass / Volume 2. Identify the Given Values - Mass: 306.0 g- Volume: 22.5 mL 3. Apply the Formula Density = 306.0 g / 22.5 mLDensity = 13.6 g/mL Therefore, the density of mercury is 13.6 g/mL.