<p>So far, the law of conservation of mass based on “mass-time” (∂M/∂T) has been used to provide kinetic models. Based on the author’s studies, no mathematical model capable of fully explaining the kinetic curves has been written so far. In this article, for the first time, the law of conservation of “dynamic mass” based on “mass-mass” (∂M/∂M) is used. In chemical equilibrium reactions, it is possible to apply the law of conservation of mass in the form of mass-mass and mass-time. One of the important characteristics of the “dynamic mass equation” is that, in addition to obtaining mass-mass models, it also enables its transformation into mass-time (kinetics) models. In this article, using the dynamic mass equation, the mass-time model for constant concentration and variable (unlimited) concentration is presented. Then the “Instantaneous reaction rate” models for products and reactants are obtained. It is also shown that for an equilibrium reaction, the obtained models are able to calculate the product production capacity for each amount of reactants.</p>