In a study of the decomposition of ammonia on a platinum surface at 856 °C NH3-1/2 N₂ + 3/2 H₂ the following data were obtained: [NH3], M seconds 5.79x10-3 0 2.90x10-3 1.45x10-3 1.50x10³ 998 7.25x10-4 1.75x103 Hint: It is not necessary to graph these data. (1) The observed half life for this reaction when the starting concentration is 5.79x10-³ M is starting concentration is 2.90x10-³ M is (2) The average rate of disappearance of NH3 from t = 0 s to t = 998 s is (3) The average rate of disappearance of NH3 from t = 998 s to t= 1.50x10³ s is (4) Based on these data, the rate constant for this Border reaction is Ms1. Ms1 M s ¹. s and when the

In a study of the decomposition of ammonia on a platinum surface at 856 °C NH3-1/2 N₂ + 3/2 H₂ the following data were obtained: [NH3], M seconds 5.79x10-3 0 2.90x10-3 1.45x10-3 1.50x10³ 998 7.25x10-4 1.75x103 Hint: It is not necessary to graph these data. (1) The observed half life for this reaction when the starting concentration is 5.79x10-³ M is starting concentration is 2.90x10-³ M is (2) The average rate of disappearance of NH3 from t = 0 s to t = 998 s is (3) The average rate of disappearance of NH3 from t = 998 s to t= 1.50x10³ s is (4) Based on these data, the rate constant for this Border reaction is Ms1. Ms1 M s ¹. s and when the

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

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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In a study of the rearrangement of ammonium cyanate to urea in aqueous solution at 50 °C NH,NCO(aq)→(NH,),CO(aq) the following data were obtained: (NH,NCO], M 0.146 1.83x10 2 S.66x10 7.30x102 3.65x102 minutes 2.44x10 812 Hint: It is not necessary to graph these data. (1) The observed half life for this reaction when the starting concentration is 0.146 M is concentration is 7.30x102 M is min and when the starting min. (2) The average A(1/[NH,NCO]) / At from t= 0 min to t- 812 min is The average A(1/[NH,NCO]) / At from t= 812 min to t= 2.44x103 min is M1 min M' min . (3) Based on these data, the rate constant for this v order reaction is M1 min !
In a study of the gas phase decomposition of dinitrogen pentoxide at 335 K N₂O5(g) 2 NO₂(g) + 1/2O₂(g) the concentration of N₂O5 was followed as a function of time. It was found that a graph of In [N₂O5] versus time in seconds gave a straight line with a slope of -7.00x 10-3 s-¹ and a y-intercept of -1.96. Based on this plot, the reaction is order in N₂O5 and the rate constant for the reaction is
The following data was obtained for the decomposition of X2 in the gas phase. X2→Y + Z 0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00 (hr) [X2] 0.250 0.213 0.182 0.155 0.133 0.113 0.097 | 0.082 0.070 0.060 0.051 a. Determine the rate constant for this reaction. b. How much X2 is left if 0.457 M of the gas is allowed to decompose for 1.75 hours? c. What is the half-life of 0.892 M X2?
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The following data are for the gas phase decomposition of dinitrogen pentoxide at 335 K.N2O5(g) 2 NO2(g) + ½ O2(g) [ N2O5], M 8.95×10-2 4.48×10-2 2.24×10-2 1.12×10-2 time, s 0 98.3 197 295 Hint: It is not necessary to graph these data.(1)The half life observed for this reaction is s .(2)Based on these data, the rate constant for this _______zerofirstsecond order reaction is s -1.
Electrochemical Equilibria: Electrolytic DepositionOlympic gold medals are plated with gold rather than being pure gold. A minimum of 6 grams of gold (MW = 196.97 g/mol) and at least one gram of silver (MW = 196.97 g/mol) must be present in an Olympic gold medal.Silver content is 92.5 percent. A total of 340 gold medals were awarded at the Tokyo Olympics in 2021 to athletes who are deserving Assume each medal is made by coating a 60-mm diameter, 3-mm thick, gold-free silver disc with a gold-free coating. Determine the alloying of a disk with gold via electrolytic deposition using a gold (III) solution. following: a) Time in hours required to finish plating all gold medals used in the Tokyo Olympics If the available electricity source can deliver 50 current in amperes, the Olympics will have a minimum gold content.
For the gas phase decomposition of bromoethane, CH;CH,Br >C,H4 + HBr -1 the rate constant in s has been determined at several temperatures. When In k is plotted against the reciprocal of the Kelvin temperature, the resulting linear plot has a slope of-2.63x104 K and a y-intercept of 29.6. The value of the rate constant for the gas phase decomposition of bromoethane at 703 K is -1 (Enter your answer to one significant figure.)
In a study of the decomposition of ammonia on a platinum surface at 856 °C NH3¬1/2 N2 + 3/2 H, the following data were obtained: NH3), M 1.95x10-3 1.50x103 9.75x10-4 1.75x103 7.80×10-3 3.90x10-3 seconds 0 1000 Hint: It is not necessary to graph these data. (1) The observed half life for this reaction when the starting concentration is 7.80×103M is s and when the starting concentration is 3.90×103 Mis (2) The average rate of disappearance of NH3 from t= 0 s to t= 1000 s is ]Ms!. (3) The average rate of disappearance of NH3 from t= 1000 s to t= 1.50×103 s is ]Ms!. (4) Based on these data, the rate constant for this v order reaction is Ms!
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In a study of the gas phase decomposition of dinitrogen pentoxide at 335 K N2O5(g)2 NO,(g) + ½ O2(g) the concentration of N2O5 was followed as a function of time. It was found that a graph of In[N,O3] versus time in seconds gave a straight line with a slope of -7.38×10-3 s and a y-intercept of -3.13. Based on this plot, the reaction is | order in N2O5 and the half life for the reaction i | seconds.
The following are Biophysical Chemistry Questions: When we are determining the equilibrium affinity (K) for a binding reaction or the rate constant (k) for a reaction, why do we make multiple measurements? Why is it useful to put one (or more) reagents in great excess of the other (for equilibrium analysis or kinetic analysis?) Why do you start learning about heat and work in thermodynamics witht the ideal gases instead of chemical reactions?