is h2 one or two moles?
' H2 has two atoms, so a mole of H2 would have 1 mole of H2 molecules, and when broken down into atoms, 2 moles of atoms. ... As hydrogen gas naturally occurs in a diatomic state, it is true that there is only one mole of naturally-occurring elemental hydrogen in answer one, but one mole of H2 is formed from 2 moles of H.