We're going to remember what the rate law is and what the rate constant is and how enzymes affect these two quantities. And we're also going to remember what the order of reaction is. So let's begin with the following hypothetical chemical reaction. We have reactants A and B that are being consumed and C and D, the products are being formed. Now because we have a one to one to one to 1 mol ratio, because the coefficients are one to one to one to one and because these are being consumed and these are being produced at the same time these are being consumed. These four equations basically describe the rates of these individual reactants.