the atomic radii of Nitrogen and Oxygen are shown belo. Elelment Nitrogen oxygen. Atomic Radium n/m 0.075 0.073. a)Explain Why Nitrogen Atom is larger than an Oxygen atom?​

that's what i got you can count the number of atoms

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.

yes the answer is total mass in unchanged   : )