Final answer:
The density of the unknown substance with a mass of 75.7 g and a volume of 6.7 cm³ is calculated to be 11.3 g/cm³. To identify the substance, the calculated density should be compared with known densities of substances, but this requires a complete reference table of densities.
Step-by-step explanation:
The identity of an unknown substance can be determined through properties such as density, which is a characteristic physical property of a substance. The question asks us to identify an unknown substance with given mass and volume using the property of density.
To find the density of the unknown substance, we use the formula Density = Mass / Volume. Substituting the given values:
- Mass = 75.7 g
- Volume = 6.7 cm³
Therefore, the density of the unknown substance is calculated as Density = 75.7 g / 6.7 cm³ = 11.3 g/cm³. Comparing this value with the densities listed in reference materials, we can make a hypothesis about the identity of the substance based on its density.
The provided table seems to indicate different substances with their corresponding mass and volume, from which their densities can be derived. However, the table is incomplete, and the correct identification requires a complete list of densities to refer to.