A mole is a unit of measurement in chemistry. Here is the official definition: One mole of something (say, atoms, or raindrops) is equal to as many of that something as there are atoms in 12 grams ...

Instead, chemists use a quantity called amount of substance, measured in a unit called the mole (mol). The mass of one mole of any substance is numerically equal to its relative formula mass or ...

Relative formula masses can be calculated and used ... Calculations in chemistry - Higher - AQA The mole is the unit for amount of substance. The number of particles in a substance can be found ...