Question

What is the molar mass of oxygen?

Answer 1

Of oxygen `"atoms"`, `16.00` `g*mol`. Of oxygen `"molecules"`, `32.00` `g*mol^-1`.

Explanation:

We know that the oxygen gas we breathe is the diatomic molecule, `O_2`; in fact most common elemental gases are diatomic (what are the exceptions to this generalization?).