Can you please help me with number 10. thanks (HTA radioactive isotope decays so that only 1/4 of the original sample remains after 60 days. How long isthe half-life of the isotope?8. 2Tc is a radioisotope that is used to assess heart damage. If 400 mg of 2Tc is administered to apatient, how much 23TC will remain after 30 hours? (Given: half-life of Tc is 6.0 hours)9. A wooden tool from an archaeological site is found to contain only 1/8 the amount of radioactive Cthat is found in living trees. How old is this wooden tool?Given: t1/2 of %C is 5600 years.10. A student currently has 30 mg of caffeine in her body. If the caffeine came from a coffee drink that sheconsumed 12 hours ago, how many milligrams of caffeine were present in the drink? (t1/2 is 6 hours)(note – The original amount has been declining for 12 hours to reach 30 mg.)

Given:Currendy amount of caffeine in body, [A] = 30 mgcurrent time, t= 12 hrs half life…

10. A student currently has 30 mg of caffeine in her body. If the caffeine came from a coffee drink that she consumed 12 hours ago, how many milligrams of caffeine were present in the drink? (t1/2 is 6 hours) (note - The original amount has been declining for 12 hours to reach 30 mg.)

10. A student currently has 30 mg of caffeine in her body. If the caffeine came from a coffee drink that she consumed 12 hours ago, how many milligrams of caffeine were present in the drink? (t1/2 is 6 hours) (note - The original amount has been declining for 12 hours to reach 30 mg.)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

Can you please help me with number 10. thanks

(HT
A radioactive isotope decays so that only 1/4 of the original sample remains after 60 days. How long is
the half-life of the isotope?
8. 2Tc is a radioisotope that is used to assess heart damage. If 400 mg of 2Tc is administered to a
patient, how much 23TC will remain after 30 hours? (Given: half-life of Tc is 6.0 hours)
9. A wooden tool from an archaeological site is found to contain only 1/8 the amount of radioactive C
that is found in living trees. How old is this wooden tool?
Given: t1/2 of %C is 5600 years.
10. A student currently has 30 mg of caffeine in her body. If the caffeine came from a coffee drink that she
consumed 12 hours ago, how many milligrams of caffeine were present in the drink? (t1/2 is 6 hours)
(note – The original amount has been declining for 12 hours to reach 30 mg.)

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