15 16 17 18 19 20 21 22 23 24 25 26 -4 -1 At a certain temperature this reaction follows first-order kinetics with a rate constant of 8.87 x 10s 2H,PO, (aq) → P,05 (ag) +3H,0 (aq) Suppose a vessel contains H,PO, at a concentration of 0.610M. Calculate the concentration of H,PO, in the vessel 700. seconds later. You may assume no other reaction is important. Round your answer to 2 significant digits. M

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