Question

Which contains more atoms 1mole of Fe or 1 mole of H2? Justify your stand.

Answer 1

1 mole of hydrogen has twice the number of atoms as 1 mole of iron.

Explanation:

Hydrogen exists as diatomic molecules (H2) (two atoms per molecule). Iron exists as monoatomic Fe atoms. So, one mole of hydrogen would consist of two moles of hydrogen atoms, while one mole of iron would consist of one mole of Fe atoms.