15. Chemical Kinetics

Which statement best defines the rate-determining step in a chemical reaction mechanism?

Given the following three elementary steps:1) NO_2 + CO → NO + CO_22) NO_2 + NO → NO_3 + NO3) NO_3 + CO → NO_2 + CO_2What is the overall reaction that results from these steps?

What is the most likely mechanism for the reaction of 2-bromo-2-methylpropane with hydroxide ion to form 2-methyl-2-propanol?

Which of the following statements concerning a possible mechanism for a reaction is false?

If the reaction x + 2 y → xy₂ occurs by the proposed mechanism, which of the following could be the rate law for this reaction?

In a proposed reaction mechanism, the rate-determining step involves the collision of two reactant molecules: NO and O2. What is the molecularity of the rate-determining step?

If the uncatalyzed reaction occurs in a single elementary step, which of the following statements is true?

For the following reaction mechanism:Step 1: NO_2 + CO → NO + CO_2 (slow)Step 2: NO + NO_2 → N_2O_2 (fast)Which of the following best describes the rate law for the overall reaction?

Which of the following elementary reactions has a molecularity of three?

An elementary reaction is known to be bimolecular. What does this mean?

Which of the following statements about reaction mechanisms is false?

A mechanism for a naturally occurring reaction that destroys ozone is given by the following steps:Step 1: O3(g) + HO(g) → HO2(g) + O2(g)Step 2: HO2(g) + O(g) → HO(g) + O2(g)What is the molecularity of the overall reaction?

A reaction has the following overall equation: 2 NO_2(g) + F_2(g) → 2 NO_2F(g). Experimental data show that the rate law is rate = k[NO_2][F_2]. Based on this information, how many elementary steps are most likely involved in the reaction mechanism?

Consider the following three-step mechanism for a reaction: Step 1: Cl2(g) ⇌ 2Cl(g) (fast) Step 2: Cl(g) + CHCl3(g) → HCl(g) + CCl3(g) (slow) Step 3: Cl(g) + CCl3(g) → CCl4(g) (fast). Which species are intermediates in this mechanism?