O a) 3.13%b) 25.0%c) 6.25%d) 12.5%e) 50.0% Radioisotope X has a half-life of 4.0 h. Based on the figure below, if the originalsample of the radioisotope was 16.00 g, what percentage of the sample would be leftafter 12.0 hours?1816141210412162024Time (hours)10,981Concentratlon (M)

Half life (t1/2) :- The time required for the concentration of reactant to reduce to half of its…

Answered: Radioisotope X has a half-life of 4.0…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter18: Nuclear Chemistry

Section: Chapter Questions

Problem 68QRT

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Fluorine-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?
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Radioisotope X has a half-life of 4.0 h. Based on the figure below, if the original sample of the radioisotope was 16.00 g, what percentage of the sample would be left after 12.0 hours?