Which of the following do you need to know to be able to calculate the molarity of a solution of an ionic compound A2B in water?
1. the mass of A2B in the solution 2. the molar mass of A2B
3. the volume of water added 4. the total volume of the solution
A) 2 and 3 only B) 1, 2, and 4 only C) 1, 2, and 3 only
D) 1 and 3 only E) 1, 2, 3, and 4

a polar bond is formed when electrons are shared unevenly between 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.