In a chemical reaction, 300 grams of reactant A is combined with 100
grams of reactant B. Both A and B
react to completion. How much will
the product weigh?

a. 200 grams
b. It cannot be determined from the given
information.
с. 400 grams
d. 300 grams

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.

plasma - state of matter made up of electrically charged particles