A reaction happens between barium chloride dihydrate and silver nitrate. How much of each reactant (grams) how much would you need to obtain 2 grams of precipitate, using stoichiometry?

6.4 cm (max) - 25 cm (min)

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.