I Review | Constants | Periodic TableThe radioisotope sodium-24 is used to determine the levels of electrolytes in the body.Part AA 24-ug sample of sodium-24 decays to 3 µg in 45 h. What is the half-life, in hours, of sodium-24?Express your answer using two significant figures.?ValueUnitsSubmitPrevious Answers Request AnswerX Incorrect; Try AgainProvide FeedbackNext >

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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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40) If the half life- of a 100 mg radioactive isotope is 24 hrs. How many milligrams remain after second half life.
Therapy: Rodrigo was admitted to undergo Radioactive lodine therapy to complete his treatment of thyroid cancer. He was given 150 mCi of l-131 on Friday at 1:00pm. Due to a sudden heart attack, he died on Sunday, at 8:00am. Given a physical half-life of 8 days, and a biological half-life of 80 days, how much radioactive lodine is left in the corpse of Rodrigo at the time of his death?
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Q7. A 150 grams of a radioactive gas is accumulated in a container. After 3 months, only 141 grams of the gas remains. What is the monthly rate of decay for this gas? What is the half-life of this gas in year?
MISSED THIS? Read Section 17.5. You can click on the Review link to access the section in your eText. Part A Radium-223 decays with a halr-fe of 11.4 days How long will it take for a 0240-mol sample of radium to decay to 3.00 x 10 mol ? 91.2 days Submit Previous Anawera Request Answer * Incorrect; Try Again; 9 attempts remaining
Flag for follow-up Christopher drew a graph to show changes in the mass of Bismuth during 25 days of radioactive decay. Based on the results below, what is the half-life of Bismuth in days? Radioactive Decay 100 100 80 60 40. 12.5 20- 6.25 3.125 10 15 20 25 Time (days) O A. Half of the 100 g sample is not radioactive anymore after 5 days. O B. Half of the 100 g sample is not radioactive anymore after 10 days. O C. Half of the 100 g sample is not radioactive anymore after 15 days. O D. Half of the 100 g sample is not radioactive anymore after 20 days. DELL Mass Blomuth (g)
Answer the first 3.. which are 1.1 -1.3
/ilmn/takeAssignment/takeCovalentActivity.do?locator=assignment-take [References] CHEMWORK Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 x 10¹0 years. What is the age of a rock sample that contains 102.1 µg 87Rb and 7.3 µg 87Sr? years old Assume that no 87 Sr was present when the rock was formed. The atomic masses are given in the table below: Nuclide Atomic Mass 87Rb 86.90919 86.90888 Try Another Version 3 item attempts remaining h Previous earch 87 Sr Submit Submit Answer BI Cengage Learning Cengage Technical Support 31°C Haze Save and I 9:18 4/29/ F»))
Effective The table of parent-daughter isotopes shows three different isotope pairs that are used in radioisotope dating. Examine the chart and answer the following questions. Half-Life Isotope Daughter of Parent Dating Range (y) Parent uranium-235 lead-207 710 milion >10 million 10 000 to 3 billion potassium 40 argon 40 1.3 bilion 22. Lead-207 is called the daughter of uranium-235. What does this mean? carbon-14 nitrogen-14 5730 up to 50 000 23. How old is a rock sample that oontains uranium-235 and lead-207 in equal amounts? 24. The age of Earth was first established in 1953 when Claire C. Patterson of the California Institute of Technology used a uranium-lead clock to analyze rock. In comparing amounts of uranium-235 with lead-207, he established that about 8 half-lives of uranium-207 had passed since the rock formed. Using this data, estimate the age of Earth. 25. lodine-131 is a radioactive substance that can be used to treat certain thyroid conditions. It has a half-life of 8…
< 7:31 1 4 7 If 28.0% of a sample of copper-64 decays in 6.16 hours, what is the half-life of this isotope (in hours)? +/- 2 LO Question 19 of 20 5 8 hours 3 6 9 O ll 100 Tap here or pull up for additional resources Submit X с x 100
The half-lives of different radioisotopes are given in the table. Half-life (min) Radioisotope argon-44 lead-196 time: potassium-44 indium-117 How long would it take, in minutes, for the amount of argon-44 to decrease from 64.0 mg to 8.00 mg? ADI 12 37 22 43 NOV 1 C min C 3:37 1 ()))
A radioactive iodine sample has a half life of 6 days. If the original sample is 24 grams, how much radioactive sample remains after 24 days? 22.5 grams 3 grams 1.5 grams 0.75 grams 4:44 PM 4/8/2021 P Type here to search home prt sc delete backspace wnu lock & 3 DQ 1- Need Ppenadic toble home

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