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

question 44

Multiple Choice

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

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

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