A bar of soap measures 8 cm by 5 cm by 2 cm. Its mass is 90g. Calculate its density and predict whether this soap will float.

Density = mass / volume

volume = 8 x 5 x 2

volume = 80 cm³

Density = 90 / 80

Density = 1.125 g/cm³

The bar of soap will not float because it has a density greater than water, which is 1 g/cm³