Calculate the degree of unsaturation (or IHD, Index of Hydrogen Deficiency) for C8H12.

4.

Explanation:

Hello,

In this case, for the calculation of the degree of unsaturation, we apply the following formula:

Thus, since we have eight carbon atoms and twelve hydrogen atoms, it turns out:

It means that four substituents are missing in order saturate the molecule.

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the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.