How do you find the mass of a substance if you know the volume?
You will need to determine density. Density is the property of a substance that relates its mass and volume. You can usually find the density of a substance by searching online.
You need to determine the density of the substance and then multiply the known volume times the density to calculate mass.
What is the mass of a sample of copper that has a volume of
Look up the density of copper. The density of copper is
Multiply the volume times the density.