What is the unit of the rate constant of a zero-order reaction? mol/s false 1/s false 1/M•s false M/s true Single Which of the following rate laws shows a first-order reaction? rate = k[A] false rate = k[B] false rate = k[A][B] true rate = k[A][B]₂ false Single The half-life of a reactant involved in a first-order reaction is 693 seconds. What is its rate constant? 0.001/s true 0.001 M/s false 1,000/s false 1,000 M/s false Single At a certain time t in the progression of a reaction, the potential energy curve reaches its peak. What does this peak indicate? The reactants have reached a transition state true The reactants have been depleted false The reactants are at their maximum concentration false The products are at their maximum concentration false Single You need to find the activation energy of a second-order reaction using the Arrhenius equation. What should be the unit of your rate constant? mol/s false 1/s false 1/M•s true The rate constant is not used in the Arrhenius equation. false Single Which of the following items is produced by a reaction facilitated by heterogeneous catalysis? acetic acid false margarine true high-density polyethylene false gasoline false Single What is the name of the enzyme found in saliva that facilitates the decomposition reaction of starch? ptyalin true peptin false lipase false trypsin false Single Not all collisions of particles of reactants lead to the formation of products. In these cases, the collision: has not yet reached the adequate activation energy true needs the presence of a catalyst to proceed false involved too few particles false converted too much of their kinetic energy into heat false Single Which of the following statements is true about the half-life of a reactant involved in a zero-order reaction? It is independent of the initial concentration of the reactant true It is dependent on the initial concentration of the reactant false It is inversely proportional to the initial concentration of the reactant false It is dependent only on the rate constant of the reaction false Single Who was the first person to introduce to the scientific community the concepts of 'reaction order' and 'half-life'? Cato Guldberg and Peter Waage false Jacobus van't Hoff and Svante Arrhenius false Ludwig Wilhelmy false Wilhelm Ostwald true Single