What is a Mole?
What is a Mole? A big problem when we try to count atoms . W e can compare numbers of atoms quite easily. Mole: Chemists use atoms of carbon-12 as their standard and measure the amount of a substance in a unit called 'the mole '. One mole of a substance contains the same number of particles as atoms in 12 grams of carbon-12. I n 1 gram (1 mole) of hydrogen there are about 600 000 000 000 000 000 000 000 atoms . This number is known as the Avogadro constant, and is written 6 x 10 23 . moles of atoms = mass/ R.A.M. The mole , abbreviated mol , is an SI unit which measures the number of particles in a specific substance. A mole is the quantity of anything that has the same number of particles found in 12.000 grams of carbon-12. One mole is the Avogadro number of particles (atoms, molecules, ions or electrons) in a substance.