Reaction type: double replacement ill start looking for the others
So your activation energy is the distance between the potential energy of your reactants (which is the flat line in the left of the diagram) and the peak (which is the highest point in the diagram). From the looks of it, the peak of the diagram is at 450 kJ. Your reactants are at 200 kJ.
Subtract 450 from 200, and you're at your answer!
This has all of the charges above the columns. Hopefully it helps!
Answer:
B
Explanation:
As you can see in these 4 examples, B- looks completely different from A, C, D! In B: The reactants and products are completely different in the Element Figures.
Chemical is the answer your looking for.