You will find additional information needed to answer your questions at the last page of this test. If you must change an answer, be sure to erase the old answer completely. According to the collision theory, the activated complex that forms in step 1 should have the following structure. The concentration of the catalyst will go down as a reaction proceeds. The catalyst provides a new pathway in the reaction mechanism.
Catalyst speeds up the reaction.
Two of these. None of these. A situation impossible to carry out. The reaction to produce additional H 2 and X 2 . The reaction to produce H 2 but no additional X 2 .