Final answer:
The density of a substance with a mass of 82.3 g and a volume of 12.6 mL is approximately 6.53 g/mL. This is calculated by dividing the mass by the volume.
Step-by-step explanation:
To calculate the density of a substance, you must divide the mass by the volume. For the given problem, the student has a mass of 82.3 g and a volume of 12.6 mL. Therefore, the density calculation is 82.3 g divided by 12.6 mL.
Density = Mass / Volume
Density = 82.3 g / 12.6 mL
Performing this division gives us a density:
Density ≈ 6.53 g/mL
This is how you determine the density of a substance using its mass and volume.