The gram formula mass of a substance is known as the mass of one mole. The mass, number of moles, concentration or volume of a substance can be calculated easily if you learn two formula triangles.

The gram formula mass (GFM) of a substance is known as the mass of one mole.

Relative atomic masses of selected elements can be found in the SQA Data Booklet.These can be used to calculate the gram formula mass of a substance.

What is the mass of one mole of calcium chloride?

To calculate this, work out the formula of calcium chloride then add all the mass numbers together.

One mole of calcium chloride has a mass of 111 g.