At a certain temperature the rate of this reaction is first order in H,CO, with a rate constant of 1.58 s : H,Co, (ag) -- H,0 (aq) +co, (aq) Suppose a vessel contains H,CO, at a concentration of 1.31M. Calculate the concentration of H,CO, in the vessel 0.430 seconds later. You may assume no other reaction is important. Round your answer to 2 significant digits.