How many moles are in 8.2 x 1022 molecules of N2I6?

Answer 1

A better question is "How many moles does 8.2 x 10²² molecules of N₂I₆ make?"

Avogadro's number (which is 6.022 x 10²³) is the number of molecules in 1 mole of N₂I₆ (or 1 mole of anything). So (8.2 x 1022 molecules)/(6.022 x 10²³ molecules/mole) = 0.14 moles