Exhibit 13-15 Consider the Decomposition of NO₂ at 300 °

question 66

Multiple Choice

Exhibit 13-15 Consider the decomposition of NO₂ at 300 ° C as shown below to answer the following question(s) . This reaction has been experimentally determined to follow second order kinetics with a rate constant of 0.543 M ^{- 1}s ^{- 1}.
2 NO₂ (g) →2 NO (g) + O₂ (g)
Assume an initial concentration of NO₂ in a closed vessel of 5.00 M.
-Refer to Exhibit 13-15. What is the half-life for this second order reaction?

• A) 0.272 sec
• B) 0.368 sec
• C) 0.736
• D) 1.28 sec
• E) 30 sec

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