Question

The drawing shows a chemical reaction between hydroxide and bromomethane to produce methanol and bromide ion. the middle drawing is the activated complex. the reaction is exothermic. which species has the highest energy?

Answer 1

If you're looking for the same question but this time,

Which species has an energy level that is between the energies of the other two?

The answer is: A

Answer 2

Considering the attached diagram; The species that has the highest energy is structure B. This is because it is in the transition state, which has the highest energy. Looking at it there is no stable bonding for the atoms involved; it must change to either structure A or C to exist. A catalyst will lower this added energy, the activation energy, and allow the reaction to progress at a higher rate.