Did you notice a difference in the number of times your substrate underwent addition in the two Friedel-Crafts reactions? Why was there a difference or why was there no difference?

a. Yes, there was a difference in the number of times your substrate underwent addition in the two Friedel-Crafts reactions.

b. There was a difference- due to the fact that the  first added alkyl group increaseD the electron density on benzene ring.

Explanation:

Yes, there was a difference in the number of times the substrate underwent addition in the two Friedel-Crafts reactions .

There was a difference - There was an increase in the  rate of second Friedel-Craft reaction due to the fact that the  first added alkyl group increaseD the electron density on benzene ring.

Therefore the rate of the addition reaction increases.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.