Molecular formula indicates the simple number of each type of atom in molecule with no information on structure. Chemical formula is a way of presenting information about the chemical propagation of atom that constitute a particular chemical compound or molecule, using chemical element symbols.
Copper Sulfate (CuSO4) compound is basically comprised of Copper (II) ion and Sulfate ion. Ions are C<span>u2</span>+ and S<span>O4 2</span><span>−</span>.