The atomic mass of an element and the molar mass of the element are related concepts. The atomic mass of an element is the average mass of the atoms of that element, taking into account the different isotopes and their abundances. It is usually expressed in atomic mass units (u) or grams per mole (g/mol).
On the other hand, the molar mass of an element is the mass of one mole of that element, expressed in grams per mole (g/mol). It is numerically equal to the atomic mass of the element.
For example, the atomic mass of carbon (C) is approximately 12.01 u, which means that one atom of carbon has an average mass of 12.01 atomic mass units. The molar mass of carbon is also 12.01 g/mol, which means that one mole of carbon atoms has a mass of 12.01 grams.
The relationship between atomic mass and molar mass is based on Avogadro's number, which is approximately 6.022 × 10^23. Avogadro's number represents the number of atoms, molecules, or particles in one mole of a substance. Since the molar mass is expressed in grams per mole, it is numerically equal to the atomic mass in atomic mass units.
In summary, the atomic mass of an element provides the average mass of one atom of that element, while the molar mass of an element gives the mass of one mole of that element. Both values are numerically equal and are expressed in different units (u or g/mol), but they represent the same amount of substance on a different scale.