The Elementary Reaction 2 NO₂(g)→ 2 NO(g)+ O₂(g)

question 112

Multiple Choice

The elementary reaction 2 NO₂(g) → 2 NO(g) + O₂(g)
Is second order in NO₂ and the rate constant at 501 K is 7.93 × 10^-3 M^-1s^-1.The reaction half-life at this temperature when [NO₂]₀ = 0.45 M is ________ s.

• A) 3.6 × 10^-3
• B) 0.011
• C) 126
• D) 87
• E) 280

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