For the gas phase decomposition of hydrogen iodide at 700 K 2 HI(g) →→→ H₂(g) + 1₂(9) the average rate of disappearance of HI over the time period from t = 0 s to t = 1.11×103 s is found to be 6.96x10-4 M/s. What is the average rate of appearance of H₂ over the same time period? M/s.

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