Final answer:
The formula to calculate the volume of an object when you know its density and mass is volume = mass/density. This formula can be derived from the formula for density, which is density = mass/volume.
Step-by-step explanation:
The formula to calculate the volume of an object when you know its density and mass is volume = mass/density. This formula can be derived from the formula for density, which is density = mass/volume. By rearranging the density formula, we get the formula for volume. For example, if the mass of an object is 2 grams and its density is 4 grams per cubic centimetre, you can calculate the volume by dividing the mass by the density: 2 grams / 4 grams per cubic centimetre = 0.5 cubic centimetre.