Is the cube pictured at the right made of pure aluminum?

Based on the calculation below, the cube is not made of pure aluminum.

Mass = 20g

Volume = 5cm³

Density will be:

Density = Mass / Volume

Density = 20/5

Density = 4g/cm³

It should be noted that the theoretical density of Aluminum should be 2.7g but since the calculated value is 4g, then the cube is not made of pure aluminum

In conclusion, the cube isn't made of pure aluminum.

Read related link on:

link