The Reaction 2NO → N₂ + O₂ Has the Following

question 3

Multiple Choice

The reaction 2NO → N₂ + O₂ has the following rate law: After a period of 2.0 × 10³ s, the concentration of NO falls from an initial value of 2.8 × 10^-3 mol/L to 2.0 × 10^-4 mol/L. What is the rate constant, k?

• A) 4.0 × 10^-4 M^-1/s
• B) 7.2 × 10^-2 M^-1/s
• C) 1.7 × 10^-4 M^-1/s
• D) 4.0 × 10^-7 M^-1/s
• E) 3.6 × 10^-2 M^-1/s

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