The difference between these two chemical formulas: 4 H2O and H8O4.

The difference between the two chemical formulas has been on the basis of the number of the molecules present. There have been 4 molecules of , while only 1 molecule of .

The chemical formula has been used for the determination of the number of atoms of each element present in the compound.

The chemical formula 4 gives the idea that there have been 4 molecules of water, with each molecule has consisted of 2 hydrogens and 1 oxygen atom. The total number of atoms has been 8 hydrogen atoms and 4 oxygen atoms.

The chemical formula gives insight into the presence of 1 molecule having 8 atoms of hydrogen and 4 atoms of oxygen.

The similarity in the chemical formula has been the presence of the same number of atoms. The difference between the two chemical formulas has been on the basis of the number of the molecules present. There have been 4 molecules of , while only 1 molecule of .

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Explanation:

The given chemical formula is;

             4H₂O                 H₈O₄

H₂O signifies 2 atoms of hydrogen bonding with 1 atom of oxygen

H₈O₄ signifies 8 atoms of hydrogen bonding with 4 atoms of oxygen

  The 4 coefficient before H₂O signifies the number of moles.

It appears H₂O is 4 moles of water

                  H₈O₄  is 1 mole of the compound

The number of moles of each of the compound differs.

increased stability in the completion of fluorine's outer shell.