She fills a reaction vessel with HI and measures its concentration as the reaction proceeds: time (seconds) 0 0.700 M 1.00.307 M 2.00.196 M 3.0 0.144 M 4.0 0.114 M Use this data to answer the following questions, Write the rate law for this reaction rate = 0 0.9 D P Calculate the value of the rate constant k. Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol х 5 ?