Flexi Says: The molecular mass of a compound is the mass of one molecule of that compound. The mass of compound in given moles can be determined by multiplying molar mass and number of moles of that compound. Molar mass is defined as the mass of one mole of representative particles of a substance. It is expressed in units of grams per mole (g/mol). Mass(g) = Molar Mass(g/mol) x number of moles
