A chemistry graduate student is studying the rate of this reaction: CICH,CH,CI (g) → CH,CHCI (g) + HC1 (g) She fills a reaction vessel with CICH,CH,Cl and measures its concentration as the reaction proceeds: time (seconds) [CICH,CH,CI] 0.0300 M 1.0 0.0208 M 2.0 0.0144 M 3.0 0.0100 M 4.0 0.00695 M Use this data to answer the following questions. Write the rate law for this reaction. rate =k O Calculate the value of the rate constant k. k = 0 Round your answer to 2 significant digits. Also be ? sure your answer has the correct unit symbol.

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