Consider this reaction: 2NH3 (8) - N, (g) +3H2 (8) At a certain temperature it obeys this rate law. rate = 0.00439 M -1 = (0.0 sv')[NH, Suppose a vessel contains NH, at a concentration of 1.23 M. Calculate the concentration of NH, in the vessel 970. seconds later. You may assume no other reaction is important. Round your answer to 2 significant digits. IM $