(a)
Interpretation:
The fraction of strontium-90 remains after three half-life periods has to be calculated.
Concept Introduction:
Half-life period:
It is the time required for the reactant (substrate) concentration reduces to one-half of its initial concentration.
(b)
Interpretation:
The value of decay constant for strontium-90 has to be calculated.
Concept Introduction:
Half-life period:
It is the time required for the reactant (substrate) concentration reduces to one-half of its initial concentration.
(c)
Interpretation:
The number of years required for
Concept Introduction:
Half-life period:
It is the time required for the reactant (substrate) concentration reduces to one-half of its initial concentration.
Want to see the full answer?
Check out a sample textbook solutionChapter 12 Solutions
General Chemistry: Atoms First
- The radioactive isotope 64Cu is used in the form of copper(II) acetate to study Wilsons disease. The isotope has a half-life of 12.70 hours. What fraction of radioactive copper(II) acetate remains after 64 hours?arrow_forwardA chemist studied the reaction mechanism for the reaction 2NO(g)+O2(g)2NO2(g) by reacting N16O with 18O2. If the reaction mechanism is NO+O2NO3(fastequilibrium)NO3+NO2NO2(slow) what distribution of 18O would you expect in the NO2? Assume that N is the central atom in NO3, assume only N16O18O2 forms, and assume stoichiometric amounts of reactants are combined.arrow_forwardIodine-131 is used to treat tumors in the thyroid. Its decomposition is first-order with a half-life of 8.1 days. If a patient is given a sample containing 5.00 mg of I-131, how long will it take for 32% of the isotope to remain in her system?arrow_forward
- What is the half-life for the first-order decay of phosphorus-32? (P1532S1632+e) The rate constant for the decay is 4.85102 day-1.arrow_forwardFluorine-18 is a radioactive isotope that decays by positron emission to form oxygen-18 with a half-life of 109.7 min. (A positron is a particle with the mass of an electron and a single unit of positive charge; the equation is F918O188+e+10 Physicians use 18F to study the brain by injecting a quantity of ?uoro-substituted glucose into the blood of a patient. The glucose accumulates in the regions where the brain is active and needs nourishment. (a) What is the rate constant for [lie decomposition of ?uorine-18? (b) If a sample of glucose containing radioactive fluorine-18 is injected into the blood, what percent of the radioactivity will remain after 5.59 h? (c) How long does it take for 99.99% of the 18F to decay?arrow_forward
- Chemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage Learning
- Chemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub CoChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage Learning