Masteringchemistry Chapte s Homework Google Chrome https Isession masteringchemi

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Masteringchemistry Chapte s Homework Google Chrome https Isession masteringchemistry.com/myct itemviewlassignmentProblemID 66396594 CHM 130 Introduction to General, Organic and Biochemistry Problem 568 previous 11 of 12 net Problem 5.68 Part A The hanHte of oxygen-15 is 124 lf a sample of oxygen-1shas an activity of 4800 Bq how many minees wil lapse before it has an activay of 600 Bq? Express your answer to three significant figures and include the appropriate units. Value min Submit My Answers Ghet

Explanation / Answer

K   = 0.693/t1/2

    = 0.693/124   = 0.0056sec-1

K   = 2.303/t log[A0]/[A]

0.0056    = 2.303/t log4800/600

t                = 2.303*0.9030/0.0056 = 371.36sec

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