2- What is the specific gravity of a substance with a density of 2,5 mathrm(~g) / mathrm(cm)^3 ?

The specific gravity of a substance is the ratio of its density to the density of water at 4°C (the temperature at which water has its maximum density). The density of water at 4°C is approximately \(1 \mathrm{~g/cm}^3\).<br /><br />Given that the density of the substance is \(2.5 \mathrm{~g/cm}^3\), the specific gravity can be calculated as follows:<br /><br />\[ \text{Specific Gravity} = \frac{\text{Density of Substance}}{\text{Density of Water}} = \frac{2.5 \mathrm{~g/cm}^3}{1 \mathrm{~g/cm}^3} = 2.5 \]<br /><br />Therefore, the specific gravity of the substance with a density of \(2.5 \mathrm{~g/cm}^3\) is 2.5.