# What is density?

##### 1 Answer

Density is the mass per unit of volume of a substance.

#### Explanation:

Density measures the compactness in molecular arrangement in any substance which determines how heavy or light any substance is.

The density formula is

**Examples of density include the following:**

The density of water at

The density of iron at

The density of sodium metal at

In order to determine the density of a substance, you need to know its mass and its volume. Then divide its mass by its volume, remembering to divide the units as well.

**Example**

A

**Solution**

Here is a video example of how to solve a density problem.