H2o2, hydrogen peroxide, naturally breaks down into h2o and o2 over time. mno2, manganese dioxide, can be used to lower the energy of activation needed for this reaction to take place and, thus, increase the rate of reaction. what type of substance is mno2 ?

a. a reactant

b. an inhibitor

c. an enhancer

d. a catalyst

The answer is A because it is a reactant

Four sentences:
 1) What you must do is divide the x axis into equal parts.
 2) n = 212/5 = 42.4.
 3) Each unit of the x axis is worth 42.4. Therefore, you can graph the coordinate -212 at x = -5
 4) The y-axis can maintain its magnitut and graph the -4 coordinate in y = -4