(b) in 1967, j. h. sullivan showed that this reaction was dramatically catalyzed by light when the energy of the light was sufficient to break the i-i bond in an i2 molecule. which mechanism(s) are consistent with both the rate law and this additional observation?

the i2 molecule ni the presence of uv light will be decomposed into free radical iodine which will attack electrophilic carbon atoms. this will displace a hydrogen atom. this mechanism is an electrophilic substitution by a halogen. the rate law is dependent on the concentration of iodine.

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

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.