Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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- For a reaction A → B → C where the concentration of the intermediate is negligible (dB/dt = 0), which of the following statement holds during the reaction: A. - Δ[A] + Δ[B]+ Δ[C] = 0 b. Δ[A] = - Δ[B] c. [A] = -[B] d. Δ[C] = - Δ[B] Δ[A] + Δ[B]+ Δ[C] = 0 e. Δ[A] + Δ[B]+ Δ[C] = 0arrow_forwardA chemistry graduate student is studying the rate of this reaction: NH,OH (aq) → NH, (aq)+H,0 (aq) She fills a reaction vessel with NH,OH and measures its concentration as the reaction proceeds: time [NH,OH] (milliseconds) 0.500 M 10. 0.314 M 20. 0.197 M 30. 0.123 M 40. 0.0775 M Use this data to answer the following questions. Write therato l- w for thic ronctinn Irato - M Explanation Check © 2021 MCGraw-Hill Education, AlR O Type here to searcharrow_forwardConsider the hypothetical reaction А +В+ 2C 2D + ЗЕ where the rate law is ΔΙΑ : 서A][B]2 Rate At An experiment is carried out where [A], = 1.0 x 10-2 M, [B], 3.0 М, and [C, = 2.0 M. The reaction is started, and after 6.0 seconds, the concentration of A is = 3.8 x 10- M. a. Calculate the value of k for this reaction. -2 L? mol s 1 k = b. Calculate the half-life for this experiment. Half-life c. Calculate the concentration of A after 18.0 seconds. Concentration = M d. Calculate the concentration of C after 18 seconds. Concentration Marrow_forward
- A value of k is found from the rate equation Rate = k[A]M[B]". If m-4 and n-2 and the unit for the initial rate is M/h. The unit of k is found to be M* h1 (M to the power of x h to the power of minus 1). What is the value of x?arrow_forward-1 -1 At a certain temperature the rate of this reaction is second order in HI with a rate constant of 1.0M S 2HI (g) → H₂(g) + 1₂ (g) Suppose a vessel contains HI at a concentration of 1.33M. Calculate the concentration of HI in the vessel 7.50 seconds later. You may assume no other reaction is important. Round your answer to 2 significant digits. M x10 X Ś ?arrow_forwardConsider this reaction: 2SO3 (g) →2SO₂ (g) +0₂ (8) At a certain temperature it obeys this rate law. rate = (2.99 M¹.5-¹) [SO] Suppose a vessel contains SO3 at a concentration of 0.160 M. Calculate the concentration of SO3 in the vessel 24.0 seconds later. You may assume no other reaction is important. Round your answer to 2 significant digits. M 0 x10 X Garrow_forward
- 1. Write the rate law for this reaction. k= 2. Calculate the value of the rate constant k Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol.arrow_forwardA reaction AB + C → D + E has the rate equation Rate = k[AB][C]. What are the reactants in the slow step? Include a + sign between reactants with no spaces. Treat superscripts and subscripts as regular text. 2 Netarrow_forwardA group of students compiled the data shown in data table 1 below. What is the units for the average rate constant value (k)? Exp. # [IO3-]0 (M) [I-]0 (M) [H+]0 (M) Time (s) 1 0.005 0.05 2 x 10-5 22.12 2 0.010 0.05 2 x 10-5 86.84 3 0.005 0.10 2 x 10-5 5.35 4 0.005 0.05 4 x 10-5 2.65 Question 8 options: M-2 s-1 M-3 s-2 M2 s-2 M-4 s-2 M3 s3 M-4 s-3 M-2 s-2 M2 s2 M s M s-1 M-3 s-1 M-1 s-1 M-3 s-3arrow_forward
- For the reaction of NO with Br, the following data was obtained. Use the data below to determine the rate law expression for this reaction. In the rate law expression, include the numeric value of k (with units). Experiment # Initial [NO] (M) | Initial [Br2] (M) Initial Rate (M s) 0.0100 0.0200 0.0240 2 0.0400 0.0200 0.384 0.0100 0.0500 0.0600arrow_forwardPlease answer all parts.arrow_forwardThe rate of a certain reaction was studied at various temperatures. The table shows temperature (7) and rate constant (k) data collected during the experiments. Plot the data to answer the questions. What is the value of the activation energy, Ea, for this reaction? E₂ = What is the value of the pre-exponential factor (sometimes called the frequency factor), A, for this reaction? A = kJ. mol-¹ $ $1 T(K) 400 420 440 460 480 500 520 540 560 580 k (s-¹) 0.000369 0.00200 0.00928 0.0377 0.136 0.445 1.33 3.64 9.31 22.3arrow_forward
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