Which expression represents a reaction rate? a. time/massc. energy/timeb. number/timed. time/energy

The right answer for the question that is being asked and shown above is that: "b. number/timed." Reaction Rate refers to the  speed of reaction for a reactant or product in a particular reaction is intuitively defined as how fast or slow are action takes place.

maybe because they are focused to much on being a good athelete and they dont have enough time to give idk tho