number of particles in 1 mol of a substance
6.022×10 23 elementary entities in 1 mole. This can also be written as 6.022×10 23 mol -1.The mass of one mole of a substance is equal to that substance's molecular weight.
n (amount of substance in moles)xNA (Avogadro's number)1 molx6.022 x 1023
