* Number of Molecules: The coefficient "4" in front of the chemical formula means there are 4 water molecules.

* Atoms per Molecule:

* The subscript "2" in H₂O indicates that there are 2 hydrogen atoms in each water molecule.

* The subscript "1" (understood, not written) in H₂O indicates that there is 1 oxygen atom in each water molecule.

* Total Atoms:

* Hydrogen: 4 molecules * 2 H atoms/molecule = 8 hydrogen atoms

* Oxygen: 4 molecules * 1 O atom/molecule = 4 oxygen atoms

In summary: The formula 4H₂O represents 4 water molecules, each containing 2 hydrogen atoms and 1 oxygen atom, for a total of 8 hydrogen atoms and 4 oxygen atoms.