CALCULATIONS BASED ON FORMULAE
7.4 - Calculation of Molar Mass

In section 7.1
we learned how to calculate the mass of a formula unit or a molecule. Now we
will learn how to calculate the mass of 1 mole of substance. In section
7.3, we saw that the real neat thing about Avogadro's
number is that:

We can equate the numerical quantity of mass
of a single ATOM (in amu) to the mass of a mole of the same atoms (in grams).

or, when we are talking about molecules,

We can equate the numerical quantity of mass
of a single MOLECULE to the mass of a mole of the same molecules (in grams).