At a certain temperature this reaction follows second-order kinetics with a rate constant of 0.047M ¹: 2H1 (g) → H₂(g) +1₂(e) Suppose a vessel contains HI at a concentration of 0.260M. Calculate how long it takes for the concentration of HI to decrease to 9.0% of its initial value. may assume no other reaction is important. Round your answer to 2 significant digits. 7.9 0.8 X 5

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