The mole is related to the mass of an element in the following way: one mole of carbon-12 atoms has 6.02214076 × 10 23 atoms and a mass of 12 grams. In comparison, one mole of oxygen consists, by definition, of the same number of atoms as carbon-12, but it has a mass of 15.999 grams. Oxygen, therefore, has a greater mass than carbon.
GRAM FORMULA MASS Name Determine the gram formula mass (the mass of one mole) of each compound below. 2. 3. 4. 5. 6. KMn04 KCI Na2S04 (NH4)3P04