Representative particles refer to the species present in a substance which are usually atoms and molecules. Representative particles of most elements is the atom. Iron is composed of iron atoms.
There is a conversion factor that can convert from a mole of a substance to the mass of that substance. The first step is to calculate the molar mass of an element or compound. Molar mass is a physical property defined as the mass of a given substance divided by the amount of substance. Molar Mass is expressed as g/mol. For example, if you had two carbon atoms, you would multiply the atomic mass by two. You need to use the molar mass to convert between the mass of a substance and the moles of a substance. The conversion factor depends on the relationship: one molar mass equals one mole. If you were given 3 moles of NaCl, the molar mass would be 58.5 grams per mole of