A chemical engineer is studying the rate of this reaction. NH,OH (aq) - Nн, (ад) +н,о (ад) 4' She fills a reaction vessel with NH, OH and measures its concentration as the reaction proceeds. Here's a graph of her data: 0.5- 0.6 0.4 0.2 20 40 z (seconds) Use this graph to answer the following questions: What is the half life of the reaction? Round your answer to 2 significant digits. Suppose the rate of the reaction is known to be first order in NH,OH. Calculate the value of the rate constant k. k = 0 %3D Round your answer to 2 significant digits. Also be sure you include the correct unit symbol. Predict the concentration of NH, OH in the engineer's reaction vessel after 150. seconds have passed. Assume no other reaction is important, and continue to NH,OH= M assume the rte is first order in NH,OH. Round your ansver to 2 significant digits. (w)[HO*HN]

A chemical engineer is studying the rate of this reaction. NH,OH (aq) - Nн, (ад) +н,о (ад) 4' She fills a reaction vessel with NH, OH and measures its concentration as the reaction proceeds. Here's a graph of her data: 0.5- 0.6 0.4 0.2 20 40 z (seconds) Use this graph to answer the following questions: What is the half life of the reaction? Round your answer to 2 significant digits. Suppose the rate of the reaction is known to be first order in NH,OH. Calculate the value of the rate constant k. k = 0 %3D Round your answer to 2 significant digits. Also be sure you include the correct unit symbol. Predict the concentration of NH, OH in the engineer's reaction vessel after 150. seconds have passed. Assume no other reaction is important, and continue to NH,OH= M assume the rte is first order in NH,OH. Round your ansver to 2 significant digits. (w)[HO*HN]

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter12: Chemical Kinetics

Section: Chapter Questions

Problem 44E: At 500 K in the presence of a copper surface, ethanol decomposes according to the equation...

See similar textbooks

Similar questions

The half-life of tritium, 3H, is 12.26 years. Tritium is the radioactive isotope of hydrogen. (a) What is the rate constant for the radioactive decay of tritium, in y1 and s1? (b) What percentage of the original tritium is left after 61.3 years?
The decomposition of gaseous dimethyl ether at ordinary pressures is first-order. Its half-life is 25.0 minutes at 500 C: CH3OCH3(g) CH4(g) + CO(g) + H2(g) (a) Starting with 8.00 g of dimethyl ether, what mass remains (in grams) after 125 minutes and after 145 minutes? (b) Calculate the time in minutes required to decrease 7.60 ng (nanograms) to 2.25 ng. (c) What fraction of the original dimethyl ether remains after 150 minutes?
11.41 For a drug to be effective in treating an illness, its levels in the bloodstream must be maintained for a period of time. One way to measure the level of a drug in the body is to measure its rate of appearance in the urine. The rate of excretion of penicillin is first order, with a half-life of about 30 min. If a person receives an injection of 25 mg of penicillin at t = 0, how much penicillin remains in the body after 3 hours?
A study of the rate of the reaction represented as 2AB gave the following data: Time (s) 0.0 5.0 10.0 15.0 20.0 25.0 35.0 [A](M) 1.00 0.775 0.625 0.465 0.350 0.205 0.230 (a) Determine the average rate of disappearance of A between 0.0 s and 10.0 s, and between 10.0 s and 20.0 s. (b) Estimate the instantaneous rate of disappearance of A at 15.0 s from a graph of time versus [A]. What are theunits of this rate? (c) Use the rates found in parts (a) and (b) to determine the average rate of formation of B between 0.00 s and 10.0 s, and the instantaneous rate of formation of B at 15.0 s.
Iodomethane (CH3I) is a commonly used reagent in organic chemistry. When used properly, this reagent allows chemists to introduce methyl groups in many different useful applications. The chemical does pose a risk as a carcinogen, possibly owing to iodomethanes ability to react with portions of the DNA strand (if they were to come in contact). Consider the following hypothetical initial rates data: [DNA]0 ( mol/L) [CH3I]0 ( mol/L) Initial Rate (mol/Ls) 0.100 0.100 3.20 104 0.100 0.200 6.40 104 0.200 0.200 1.28 103 Which of the following could be a possible mechanism to explain the initial rate data? MechanismIDNA+CH3IDNACH3++IMechanismIICH3ICH3++ISlowDNA+CH3+DNACH3+Fast
At 500 K in the presence of a copper surface, ethanol decomposes according to the equation C2H5OH(g)CH3CHO(g)+H2(g) The pressure of C2H5OH was measured as a function of time and the following data were obtained: Time(s) PC2H5OH(torr) 0 250. 100. 237 200. 224 300. 211 400. 198 500. 185 Since the pressure of a gas is directly proportional to the concentration of gas, we can express the rate law for a gaseous reaction in terms of partial pressures. Using the above data, deduce the rate law, the integrated rate law, and the value of the rate constant, all in terms of pressure units in atm and time in seconds. Predict the pressure of C2H5OH after 900. s from the start of the reaction. (Hint: To determine the order of the reaction with respect to C2H5OH, compare how the pressure of C2H5OH decreases with each time listing.)
Pure ozone decomposes slowly to oxygen, 2O33O2(g). Use the data provided in a graphical method and determine the order and rate constant of the reaction. Time (h) 0 2.0103 7.6103 1.00104 [O3](M) 1.00105 4.98106 2.07106 1.66106 Time (h) 1.23104 1.43104 1.70104 [O3](M) 1.39106 1.22106 1.05106
Both technetium-99 and thallium-201 are used to image heart muscle in patients with suspected heart problems. The half-lives are 6 h and 73 h, respectively. What percent of the radioactivity would remain for each of the isotopes after 2 days (48 h)?
Nitrogen (Il) oxide, NO, reacts with hydrogen, H2, according to the following equation: 2NO+2H2N2+2H2O What would the rate law be if the mechanism for this reaction were: 2NO+H2N2+H2O2 (slow) H2O2+H22H2O (fast)
11.17 Ammonia can react with oxygen to produce nitric oxide and water: 4NH3(g)+5O2(g)4NO(g)+6H2O(g) If the rate at which ammonia is consumed in a laboratory experiment is 4.23 ×10-4 mol L_1s_l, at what rate is oxygen consumed? At what rate is NO produced? At what rate is water vapor produced?
Hydrogen peroxide and the iodide ion react in acidic solution as follows: H2O2(aq)+3I(aq)+2H+(aq)I3(aq)+2H2O(l) The kinetics of this reaction were studied by following the decay of the concentration of H2O2 and constructing plots of ln[H2O2] versus time. All the plots were linear and all solutions had [H2O2]0 = 8.0 104 mol/L. The slopes of these straight lines depended on the initial concentrations of I and H+. The results follow: [I]0 (mol/L) [H+]0 (mol/L) Slope (min1) 0.1000 0.0400 0.120 0.3000 0.0400 0.360 0.4000 0.0400 0.480 0.0750 0.0200 0.0760 0.0750 0.0800 0.118 0.0750 0.1600 0.174 The rate law for this reaction has the form Rate=[H2O2]t=(k1+k2[H+])[I]m[H2O2]n a. Specify the order of this reaction with respect to [H2O2] and [I]. b. Calculate the values of the rate constants, k1 and k2. c. What reason could there be for the two-term dependence of the rate on [H+]?
11.93 On a particular day, the ozone level in Milwaukee exceeded the EPAs 1-hour standard of 0.12 ppin by 10 ppb. How many ozone molecules would be present in 1 liter of air at the detection site?