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The rate constant k for a certain reaction is measured at two different temperatures: temperature k 236.0 °C 4.2 x 100 1.8 x 10" 340.0 °C Assuming the rate constant obeys the Arrhenius equation, calculate the activation energy E, for this reaction. Round your answer to 2 significant digits. kJ 0.0 E = 1 mol Х 5 ?
Some measurements of the initial rate of a certain reaction are given in the table below. [NL] [H.] initial rate of reaction 0.794M 1.67M 0.518 M/s 0.376M 1.67M 0.245 M/S 0.794M 5.07 M 4.77 M/s Use this information to write a rate law for this reaction, and calculate the value of the rate constant k. Round your value for the rate constant to 3 significant digits. Also be sure your answer has the correct unit symbol. rate = * B B 0.0 k = Х 5 ?
Consider this reaction: 2H,PO, (aq) --P,0, (aq) + 3H,0 (aq) At a certain temperature it obeys this rate law. rate - (3.05 [H,PO.] Suppose a vessel contains H, PO, at a concentration of 0.360M. Calculate how long it takes for the concentration of H,PO, to decrease to 0.022 M. You may assume no other reaction is important. Round your answer to 2 significant digits. D 0.0 Times 10 to an exponent
A chemistry graduate student is studying the rate of this reaction: NH,OH(aq) + NH, (aq) +H2O(aq) She fills a reaction vessel with NH OH and measures its concentration as the reaction proceeds: time (milliseconds) [NH,OH] 0 0.100M 10. 0.0552M 20. 0.0381M 30. 0.0291M 40. 0.0235M Use this data to answer the following questions. % Write the rate law for this reaction. rate = 0 ロ･ロ Calculate the value of the rate constant k. k= ? Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol.