# How do you calculate mass using density and volume?

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In order to find mass when you have density and volume, you use the relationship

#"Density" = "Mass"/"Volume"#

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You multiply both sides of the equation by the volume and get:

#"Mass " = " Volume × Density"#

Here are two example calculations:

**Example 1**

A piece of aluminum has a volume of

**Solution**

#"Mass" = 6.0 cancel("cm"^3) × "2.70 g"/(1 cancel("cm"^3)) = "16.2 g"#

#" "#

**Example 2**

Calculate the mass of

**Solution**

#"Mass" = 30.0 cancel("mL") × "0.790 g"/(1 cancel("mL")) = "23.7 g"#

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Density is the mass per unit of volume of a substance. The density equation is:

To solve the equation for Mass, rearrange the equation by multiplying both sides times Volume in order to isolate Mass, then plug in your known values (Density and Volume). Then solve for Mass.

**Example**

The density of copper is

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