[momina4468]

why might the expression "a mole of nitrogen" be confusing?

[ARGOS++]

Dear Momina4468;

“A mole of Nitrogen” is simple an “Undetermined Expression”!

“Mole” looks like a Quantity but it is a Unit, more precisely a SI Base Unit.
That’s why an expression with mole should contain a numeric value, like one, or 3.25 or 0.0613 or so.

You may also read:   "Mole (unit)”


Good Luck!
                    ARGOS⁺⁺

[Yggdrasil]

Nitrogen can refer to either the atom (N) or the molecule (N₂).  One would need to clarify by saying a mole of nitrogen atoms or a mole of nitrogen molecules.