The catalytic destruction of ozone occurs via a two-step mechanism, where X can be any of several species:   (1) X + O3  →  XO + O2 [slow]   (2) XO + O  →  X + O2 [fast]   High-flying aircraft release NO into the stratosphere, which catalyzes this process. When O3 and NO concentrations are    9  ×  1012  molecule/cm3 and    8.8  ×  109  molecule/cm3, respectively, what is the rate of O3 depletion? The rate constant k for the rate-determining step is  6  ×  10−15 (cm3)2/molecule · s.  Give your answer in scientific notation. Use one significant figure in your answer.

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The catalytic destruction of ozone occurs via a two-step mechanism, where X can be any of several species:
 
(1) X + O3 

 XO + O2 [slow]
 
(2) XO + O 

 X + O2 [fast]

 

High-flying aircraft release NO into the stratosphere, which catalyzes this process. When O3 and NO concentrations are 

 
×
 1012

 molecule/cm3 and 

 
8.8 
×
 109

 molecule/cm3, respectively, what is the rate of O3 depletion? The rate constant k for the rate-determining step is 

×
 10−15 (cm3)2/molecule
·
s.

 Give your answer in scientific notation. Use one significant figure in your answer.

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