Be sure to answer all parts. If a 840. mg sample of technetium-99m is used for a diagnostic procedure, how much Tc-99m remains after each interval: (a) 6.0 h; (b) 4 days? (assume that a day is an exact value) The half-life of technetium-99m is 6.0 hours. (a) mg of Tc-99m (b) mg of Tc-99m Be sure to answer all parts. Write a balanced equation showing how this nucleus decays to form an a particle: Es-252. A Give all nuclei in the form X. :.) Z

Be sure to answer all parts. If a 840. mg sample of technetium-99m is used for a diagnostic procedure, how much Tc-99m remains after each interval: (a) 6.0 h; (b) 4 days? (assume that a day is an exact value) The half-life of technetium-99m is 6.0 hours. (a) mg of Tc-99m (b) mg of Tc-99m Be sure to answer all parts. Write a balanced equation showing how this nucleus decays to form an a particle: Es-252. A Give all nuclei in the form X. :.) Z

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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The question is: The activity of Arsenic-76 after 157.8 hrs is 120.2 micro milicuries. What was the original activity in mCi? One half life of Arsenic-76 is 26.3 hours. 6 half-lives have passed after 157.8 hrs.
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I am having trouble with the calculations for these problems. Can you please show me how you got to these answers. I have provided both the questions and answers in the attachments. Thank you.
A sample of an alpha emitter having an activity of 0.18Ci is stored in a 25.0-mL sealed container at 22 °C for 245days. (a) How many alpha particles are formed during thistime? (b) Assuming that each alpha particle is converted toa helium atom, what is the partial pressure of helium gas inthe container after this 245-day period?
If the half-life of 1-131 is 5.2 days, how many days would it take for only 3.2 x 10-2 grams of I-131 to be left in Mr. Miller's body if Dr. Goodie started him on an initial dose of 6.4 grams? (Round your answer to two decimal points)
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Fluorine-18 is a radioactive isotope use in a variety of medical imaging proceduresincluding positron emission tomography (PET) scans. Fluorine-18 decays by positron emissionwith a half-life of 1.83 hours. A medical sample containing 18F has an activity of 4.00 millicuries. How many picograms of18F are present in the sample? The atomic mass of 18F is 18.00 g/mol. (1 picogram = 1×10–12g 1 Curie = 3.7×10–10 decays/sec 1 millicurie = 1×10–3 Curies)
A patient swallows a radiopharmaceutical tagged with phosphorus-32 15 a B- emitter with a half-life of 14.3 days. The average kinetic energy of the emitted electrons is 700 keV. The initial activity of the sample is 1.31 MBq. (a) What is the number of electrons emitted in a 7.5 day period? electrons (b) What is the total energy deposited in the body during the 7.5 days? (c) What is the absorbed dose if the electrons are completely absorbed in 216 g of tissue? rad