Question

The rate of the reaction was studied at a certain temperature. O(g) + NO2(g) NO(g) + O2(g) (a) In the first set of experiments, NO2 was in large excess, at a concentration of 1. 0 ✕ 1013 molecules/cm3 with the following data collected. Time (s) [O] (atoms/cm3) 0 5. 0 ✕ 109 1. 0 ✕ 10-2 1. 9 ✕ 109 2. 0 ✕ 10-2 6. 8 ✕ 108 3. 0 ✕ 10-2 2. 5 ✕ 108 What is the order of the reaction with respect to oxygen atoms? zero order half order first order second order third order Correct: Your answer is correct. (b) The reaction is known to be first order with respect to NO2. What is the overall rate law? chemPadHelp rate = k. [O]. [NO2] rate = k. [O]. [NO_2] Correct. Determine the value of the rate constant. WebAssign will check your answer for the correct number of significant figures. 3 100. 15 Incorrect: Your answer is incorrect. Cm3/molecules·s

Answer 1

The rate of the reaction with respect to oxygen atoms is first order.

Step-by-step explanation:

The rate of the reaction can be determined by comparing the changes in the concentration of oxygen atoms ([O]) with the corresponding reaction rates. In this case, comparing Experiments 1 and 2 shows that as the concentration of oxygen atoms is doubled, the reaction rate approximately doubles, indicating that the reaction is first order with respect to oxygen atoms. Therefore, the order of the reaction with respect to oxygen atoms is first order.