The rate of a chemical reaction is defined as:, the change in reactant concentration per unit of time., the value of the kinetic energy of the substrate molecules., the final concentration of the product., the change in reactant pressure., What is the meaning of the symbol Δ in kinetic equations?, the reaction rate constant, a change in a parameter over time, the temperature of the chemical reaction, the density of the substrate or product, When the reactant is a gas, the reaction rate is determined relative to its:, pressure., volume., molar concentration., percentage., In kinetic equations, concentration is expressed in:, mole fractions., percent., moles per cubic decimeter., milligrams per liter., When a change in the concentration of substrate A does not cause a change in the reaction rate, it means that:, A cannot be a substrate in this reaction., the reaction is zero-order with respect to A., the reaction is first-order with respect to A., A is a catalyst in this reaction., If the reaction is first-order with respect to substrate B, the concentration of B:, will decrease at a constant rate during the reaction., will remain constant during the reaction., will decrease more and more slowly during the reaction., will decrease faster and faster during the reaction., It is known that the reaction is second-order with respect to a substance. A threefold increase in the initial concentration of this substance will result in:, the reaction rate increasing ninefold., the reaction rate remaining unchanged., the reaction rate increasing threefold., the reaction rate decreasing ninefold., The unit of the reaction rate constant is:, dependent on the reaction order., mole/dm³/s., dimensionless., mole per second., When the dependence of the inverse of the concentration of substance A on time is linear, it means that:, the reaction is zero-order with respect to A., the reaction is second-order with respect to A., the reaction is first-order with respect to A., the reaction rate is constant., Is the instantaneous reaction rate equal to the average rate?, No, the rates are always different., Only if it is a first-order reaction., Yes, always., Only if it is a zero-order reaction.

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