5. the diameter of a single zinc atom is 2.7 x 108 cm. divide the thickness of the
zinc coating per side of the galvanized iron by the diameter of a single zinc atom to
calculate the number of layers of atoms in the zinc coating.
number of layers of zinc atoms = thickness of zinc coating per side (cm)
diameter of zinc atom (cm)

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.

the objects have the same charge.