Question

which contain more atom,1 mole of Fe or 1 mole of H2 ? justife your answer.

Answer 1

One mole of any substance will contain avogadro number of atoms. ie; 6.022 ×10^23 atoms. Hence both contains same number of atoms.

Answer 2

Fe
1xNA molecules
1x1xNA atoms

H2
1XNA molecules
2x1xNA atoms

Ans is H2

P. S. NA is avagadro constant