# Moles of Diatomic Molecules [duplicate]

Does "Mole of Iodine" or any other element that normally appears as diatomic molecules refer to a mole of single atoms ($6.02\times 10^{23}$ iodine atoms) or a mole of the molecules ($6.02\times 10^{23}$ molecules of $I_2$)?

EDIT: If there is no specification of moles of atoms or moles of molecules, what do I do? Do I default to one of them?

e.g. in this question

For the combustion of sucrose:

$\ce{C12H22O11 + 12O2 -> 12CO2 + 11H2O}$

there are 10.0 g of sucrose and 10.0 g of oxygen reacting. Which is the limiting reagent?

## marked as duplicate by Todd Minehardt, M.A.R., ron, ringo, Klaus-Dieter WarzechaJun 13 '16 at 4:49

Good practice is to nip the problem in the bud by precisely defining what you are counting. Thus, properly, one mole of $\ce{I_2}$ molecules contains two moles of iodine atoms.