To calculate the density of mercury, you can use the formula for density:
\[ \text{Density} = \frac{\text{Mass}}{\text{Volume}} \]
Given:
- Mass of mercury = 57 g
- Volume of mercury = 4.2 mL
Since 1 mL is equivalent to 1 cm³, you can use the volume directly in cm³.
Now, substituting the given values into the formula:
\[ \text{Density} = \frac{57 \text{ g}}{4.2 \text{ cm}^3} \]
Calculating that:
\[ \text{Density} = \frac{57}{4.2} \approx 13.5714 \text{ g/cm}^3 \]
Rounding to the nearest tenth:
\[ \text{Density} \approx 13.6 \text{ g/cm}^3 \]
Thus, the density of mercury is approximately 13.6 g/cm³.