t 7 Exam (Due Dale Friday, November 17th at 11:59 p.m.) Unit 7 Exam (Fall 2017)-

Question

t 7 Exam (Due Dale Friday, November 17th at 11:59 p.m.) Unit 7 Exam (Fall 2017)- Requires Respondus LockDown Browses + Wet what s the har inte, in seconds (s). of a tirst order reaction if t takes 21.7 seconds tor the concentration to decrease 10 wered from 0 728 M to 0.170 M2 t af 400 Be sure to report your answer to the correct number of significant igures and use the abbreviated form of the desired unit Answer 1A solution is prepared by dissoiving 56. 7 grams of glucose (CH,O 180 16 grams per mole) in 0 987 klograms water The final volume of the solution is 773 miailitters. Calculate the molality of the solution. Make sure to includ correct unit symbol with the answer choice. E400

Explanation / Answer

if 1st order then

HL = ln(2)/ k

get k

ln(C) = ln(C0) - kt

ln(0.17) = ln(0.728) - k*21.7

k = (ln(0.17) - ln(0.728)) / -21.7

k = 0.067

HL = ln(2)/0.067

HL = 10.3454 seconds

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