Molar Mass and Atomic Mass

• The atomic mass unit (amu) is defined as one-twelfth of the mass of a carbon-12 atom.
• The molar mass of any element—the mass of 1 mol of atoms of that element—is equal to the atomic mass of that element expressed in atomic mass units.
• One copper atom has an atomic mass of 63.55 amu.
• 1 mol of copper atoms has a mass of 63.55 g.
• The molar mass of copper is 63.55 g/mol.