The Reaction 2NO₂ $\rightarrow$ 2NO + O₂ Obeys the Rate Law 1

question 64

Multiple Choice

The reaction 2NO₂ $\rightarrow$ 2NO + O₂ obeys the rate law 1.40 * 10^-2 [NO₂]² at 500° K. If the initial concentration of NO₂ is 1.00 M, how long will it take for the [NO₂] to decrease to 25.0% of its initial value?

• A) 71.4 s
• B) 214 s
• C) 49.5 s
• D) 1.40 *10^-2 s
• E) cannot be determined from these data

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