Question

Differentiate between density and relative density.

Answer 1

Density:

The density of a substance is defined as mass of the substance per unit volume i.e

Density = Mass / Volume .

The SI unit of density is kg/m3 in SI unit.

Relative Density:

The Relative Density of a substance is the ratio of its density to that of water. i.e

Relative Density = Density of substance / Density of water.

Relative Density is unitless.
Relative density is also known as specific gravity.

Hope this helps :)