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The Reaction 2NO → N2 + O2 Has the Following

Question 3

Multiple Choice

The reaction 2NO → N2 + O2 has the following rate law: The reaction 2NO → N<sub>2</sub> + O<sub>2</sub> has the following rate law: After a period of 2.0 × 10<sup>3</sup> s, the concentration of NO falls from an initial value of 2.8 × 10<sup>-3</sup> mol/L to 2.0 × 10<sup>-4</sup> mol/L. What is the rate constant, k? A) 4.0 × 10<sup>-4</sup> M<sup>-1</sup>/s B) 7.2 × 10<sup>-2</sup> M<sup>-1</sup>/s C) 1.7 × 10<sup>-4</sup> M<sup>-1</sup>/s D) 4.0 × 10<sup>-7</sup> M<sup>-1</sup>/s E) 3.6 × 10<sup>-2</sup> M<sup>-1</sup>/s 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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