Question

How are density mass and volume related?

Answer 1

They are related by the the density triangle.

Explanation:

They are related by the the density triangle.

d = `m/V`

m = d×V

V = `m/d`

DENSITY

Density is defined as mass per unit volume.

d = `m/V`

Example:
A brick of salt measuring 10.0 cm x 10.0 cm x 2.00 cm has a mass of 433 g. What is its density?

Step 1: Calculate the volume
V = lwh = 10.0 cm × 10.0 cm × 2.00 cm = 200 cm³

Step 2: Calculate the density

d = `m/V` = `(433 g)/(200 cm³)` = 2.16 g/cm³

MASS

d = `m/V`

We can rearrange this to get the expression for the mass.

m = d×V

Example:
If 500 mL of a liquid has a density of 1.11 g/mL, what is its mass?

m = d×V = 500 mL × `(1.11 g)/(1 mL)` = 555 g

VOLUME

d = `m/V`

We can rearrange this to get the expression for the volume.

V = `m/d`

Example:
What is the volume of a bar of gold that has a mass of 14.83 kg. The density of gold is 19.32 g/cm³.

Step 1: Convert kilograms to grams.

14.83 kg × `(1000 g)/(1 kg)` = 14 830 g

Step 2: Calculate the volume.

V = `m/d` = 14 830 g × `(1 cm³)/(19.32 g)` = 767.6 cm³