Grades for Andrea Brisby: Fi S. University of Oklahoma + O saplingleaming.com/ib

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Grades for Andrea Brisby: Fi S. University of Oklahoma + O saplingleaming.com/ibiscms/mod/ibi5Nie w.php?id-3871 620 Sapling Learning Jump to. Andrea Brisby macmillan learring Question 20 of 28 Available From: Due Date: Points Possible: Grade Category: 11/17/2017 06:00 PM 12/1/2017 11:55 PM 5 Homework 14 1 sapling Learning 15 0 16 1 17 0 18 0 19 0 The rate constant for this first-order reaction is 00450 s-1 at 400 products 5 attempt. 0% penalty. Solutions After Due Date After how many seconds will 19.1% of the reactant remain? You can check your answers. You can view solutions after the due date You have five attempts per question. There is no penalty for incorrect answers. 20 21 eTextbook 22 3 23 OHelp With This Topic 24 Web Help & Videos 250 26 0 Technical Support and Bug Reports 27 3 100 281100 Previcus Check AnrNeExt Hint © 2011-2017 Sapling Learning, Inc. about u | careers | privacy policy | tams of use | contact us | help 7:14 PM Type here to search

Explanation / Answer

if this is 1st order, since s^-1 is shown in k, then:

First = ln(C) vs. t

For first order

dC/dt = k*C^1

dC/dt = k*C

When developed:

dC/C = k*dt

ln(C) = ln(C0) - kt

let C = 0.191*C0 (19.1% left)

then

ln(0.191*C0) = ln(C0) - (0.045)*t

t =ln(0.191) / -0.045

t = 36.788 seconds

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