Lakehead University, Thunder x C www.saplinglearning.cal 210740 alibiscms/mod/ib
ID: 484923 • Letter: L
Question
Lakehead University, Thunder x C www.saplinglearning.cal 210740 alibiscms/mod/ibis/view.php?id Apps N Apps pftIELTS E CIBC Twitter f Facebook N Netflix E Imported From Safar G issu sasa Jl isu JI m Find your people My Assignment Attempts Score 2/17/2017 11:50 PM CA 85.1/100 G 2/17/201706:24 PM Gradebook Print Calculator Periodic Table Question 25 of 27 Map Sapling. Learning The rate constant for this first-order reaction is o.740 s 1at 400 ec. A products How long (in seconds) would it take for the concentration of A to decrease from 0.650 M to 0.290 M? 98 26 AO Check Answer 0 Next Exit Previous Hint C 20 2017 Sapling Learn other Bookmarks E Resources O Assignment Information Available From 2/10/2017 02:00 2/17/2017 11:50 Due Date: Points Possible 00 Grade Category: Graded Description: Policies Policy 2 You can check your answers. You can view solutions after the due d You have five attempts per question You lose S% of the points available to in your question for each incorrect a answer. Textbook O Help With This Topic OWeb Help & Videos O Technical Support and Bug ReportExplanation / Answer
[A] = [Ao] e-kt
-kt = ln ([A]/[Ao])
-kt = ln(0.290/0.650) = -0.807
given k = 0.740 s-1
t = 0.807/0.740 = 1.09 sec
time needed = 1.09 sec
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