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A chemistry graduate student is studying the rate of this reaction: 2NH, (g) → N2(g) +3H2(g) - He fills a reaction vessel with NH, and measures its concentration as the reaction proceeds: time (seconds) [NH] 0 0.0900M 10. 0.0265 M 20. 0.0155M 30. 0.0110M 40. 0.00851M Use this data to answer the following questions. rate = K O Write the rate law for this reaction. ロ･ロ Calculate the value of the rate constant k. k= х Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol
Consider this reaction: S 250, (g) + 250,()+0,6) At a certain temperature it obeys this rate law. rate -(0.373 $ '[50] Suppose a vessel contains SO, at a concentration of 0.870M. Calculate how long it takes for the concentration of So, to decrease to 12.0% of its initial value. You may assume no other reaction is important. Round your answer to 2 significant digits. х 5