2. The diagram below shows steps in the exothermic chemical reaction of bromomethane with
hydroxide to form methanol and bromide ion. The black spheres are carbon atoms, the white spheres are
hydrogen atoms, the red spheres are oxygen atoms, and the blue dots are bromine atoms.
A
B
Write a balanced chemical equation to represent the reaction.
Using the figures in the diagram, draw the steps of the reaction in the correct order, label
each molecule in the drawings, and describe what is happening in the reaction.
Draw an energy diagram of the reaction in which you label the energies of each step in
the reaction and the activation energy.

Here's what I get  

Explanation:

1. Balanced equation

HQ⁻ + CH₃-Br ⟶ HQ-CH₃ + Br⁻

(I must use HQ because the Editor thinks the O makes a forbidden word)

2. Mechanism

HQ⁻ + CH₃-Br ⟶[HQ···CH₃···Br]⁻⟶ HQ-CH₃ + Br⁻

        A                           C                         B

The hydroxide ion attacks the back side of the carbon atom in the bromomethane (A).

At the same time as the Q-H bond starts to form, the C-Br bond starts to break.

At the half-way point, we have a high-energy intermediate (C) with partially formed C-O and C-Br bonds.

As the reaction proceeds further, the Br atom drops off to form the products — methanol and bromide ion (B).

3. Energy diagram

See the diagram below.

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