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Consider this reaction: 2NH3(g) → N2(g) + 3H2(g). At a certain temperature it obeys this rate law. rate = (0.0651 s^-1)[NH3] Suppose a vessel containing NH3 at a concentration of 1.00M. Calculate the concentration of NH3 in the vessel 9.80 seconds later. You may assume no other reaction is important. Round your answer to 2 significant figures.