# How do you find the mass of a substance if you know the volume?

Nov 9, 2015

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.

#### Explanation:

"density"=("mass")/("volume")

You need to determine the density of the substance and then multiply the known volume times the density to calculate mass.

Example
What is the mass of a sample of copper that has a volume of $\text{3.00 cm"^3}$?

Solution
Look up the density of copper. The density of copper is ${\text{8.933 g/cm}}^{3}$. http://education.jlab.org/itselemental/ele029.html

Multiply the volume times the density.

$3.00 \cancel{\text{cm"^3xx(8.933"g Cu")/(1cancel"cm"^3)="26.8 g Cu}}$