Consider the following graph of the concentration of a substance X over time.
Is each of the following statements true or false?
(a) X is a product of the reaction.
(b) The rate of the reaction remains the same as time progresses.
(c) The average rate between points 1 and 2 is greater than the average rate between points 1 and 3.
(d) As time progresses, the curve will eventually turn downward toward the x-axis.