One of the radioactive isotopes used in chemical and medical research is iodine-125, which has a half-life of 61 days. How long would it take for 0.25 g to remain of a 1.00 g sample of iodine-125?A) 244 days B) 122 days C) 61 days D) 31 days Explanation: The question is asking how much time it will take for a 1.00 g sample of iodine-125 to decay to 0.25 g. Since the half-life of iodine-125 is 61 days, it takes one half-life (61 days) for the sample to reduce to 0.5 g, and another half-life (61 days) for it to reduce to 0.25 g. Therefore, the total time is two half-lives, equating to 122 days (answer B).

Given - Half life of iodine = 61 days Initial concentration of iodine (No) - 1 g After time t…

One of the radioactive isotopes used in chemical and medical research is iodine- 125, which has a half-life of 61 days. How long would it take for 0.25 g to remain of a 1.00 g sample of iodine-125? A) 244 days B) 122 days C) 61 days A 24

One of the radioactive isotopes used in chemical and medical research is iodine- 125, which has a half-life of 61 days. How long would it take for 0.25 g to remain of a 1.00 g sample of iodine-125? A) 244 days B) 122 days C) 61 days A 24

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...

See similar textbooks

Related questions

Q: Sodium-24 has a half-life of 14.8 hours. How much of a 587.7 mg sodium-24 sample will remain after…

A: All radioactive decay processes follow first order kinetics.

Q: If you accidentally spill phosphorus-32 onto your shoe, how long would it take before 99.9% of the…

Q: The half-life of cobalt is 5.3 years. How much of a 1.000- mg sample of cobalt-60 is left after 15.9…

Q: A sample of a radioactive metal starts with a mass of 400 grams. When a chemist examines it later,…

A: 25 g of metal remains after 4 half-lives.

Q: Sodium-24, which is used to locate blood clots in the human circulatory system, has a half-life of…

A: Half life period: The time required to decay half of the initial amount is known as half life…

Q: The radioactive element carbon-14 has a half-life of 5750 years. A scientist determined that the…

Q: llium-201 is used medically to diagnose heart problems. The half-life of llium-201 is 72.9 hours. If…

A: Half life= 72.9 hour Initial amount= 40.5 mg Time (t) = 187 hour

Q: A sample contains 4 grams of carbon (half life 5730 years). How much carbon will remain after 1500…

A: The mass of the sample is = 4 gram The half-life of carbon is = 5730 years The amount of the sample…

Q: The radioisotope radon-222 has a Half-Life of 3.8 days. How much of a 73.9-g sample of radon-222…

Q: Hydrogen-3 is radioactive and has a half life of 12.3 years. How long would it take a sample to…

A: All radioactive decay processes follows first order kinetics. Half life t12 is the time taken to…

Q: If you start with a 13.16 g sample of Pt197which has a half-life of 19.89 hours, what is the mass of…

Q: A scientist obtains 64 grams of a radioactive isotope. The isotope has a half-life of 3.2 days.…

Q: 5. Carbon-14 is a radioactive substance produced in the Earth's atmosphere and then absorbed by…

A: The given equation for exponential decay is: N=N0e-λt

Q: Strontium-90 is radioactive and has a half life of 28.8 years. How long would it take a sample to…

Q: Hydrogen-3 is radioactive and has a half life of 12.3 years. What percentage of a sample would be…

A: Half life (t1/2) = 12.3 years Time (t) = 39.1 years Percentage of sample would be left after 39.1…

Q: Oxygen-15 is an isotope of oxygen that is used in the medical procedure called a PET scan. The…

A: Given that, the half-life of oxygen-15 is t1/2 = 2 min. A hospital needs 1 g of oxygen-15. The…

Q: Sodium24, which is used to locate blood clots in the human circulatory system, has a halflife of…

A: Consider the given information is as follows; Order of the reaction = 1 (as radioactive decay)…

Q: Tin-129 is radioactive and has a half life of 2.23 minutes. How much of a 3.00 mg sample would be…

A: We have to predict the amount of sample left

Q: One of the radioactive isotopes used in chemical and medical research is iodine-125, which has a…

A: Given Half life of I-125 = 61 days [I-25]t = 0.25 g[I-25]0 = 1 gNow As we know radioactive decay is…

Q: One of the radioactive isotopes used in chemical and medical research is sulfur-35, which has a…

Q: Americium-241 is widely used in smoke detectors. The radiation released by this element ionizes…

A: Given, Mass of Am-241 = 5.00 g. Half life of Am-241 = 433 years. Here, we have to calculate…

Q: Radioactive vanadium-48 decays with a half-life of 16.0 days. a. What is the value of k ins? b. A…

A: Radioactive decay is a spontaneous process. Radioactive decay is a first order reaction. Thus its…

Q: Radioactive Radon-222 gas (222Rn) occurs naturally as a product of uranium decay. The half-life of…

Q: A radioactive substance has a half life of 120 years. If you have a 545 g sample of the substance,…

Q: Phosphorus-32 has a half-life of 14.0 days. Starting with 4.00 g of 32P, how many grams will remain…

A: Question is about the radioactive element phosphorus-32 . If half life of P-32 is 14 days. We have…

Q: The radioisotope radon-222 has a half-life of 3.5 days. How much of a 21 198.6 g sample of radon-222…

Q: Chemistry An unknown radioactive substance has a half-life of 3.20 hourshours . If 34.7 gg of the…

A: All natural and artificial radioactive decays follows first order kinetics The integrated rate…

Q: The Siberian Traps were a massive lava flow that is believed to be responsible for one of the…

A: This question is based on K-40/ Ar-40 method of nuclear chemistry.

Q: Carbon12 is stable and the most abundant isotope of carbon. An ancient scrap of paper has .9 times…

A: Radioactive decay follows first order kinetics. We know that : k = 0.693/t(0.5) ....(1) Here,…

Q: Radioisotope X has a half-life of 4.0 h. Based on the figure below, if the original sample of the…

A: Given,(i) initial amount of radio isotope X = 16.00 gHalf-life = 4.0 hTime taken for decay = 12.0…

Q: A radioactive sample contains 2.90 gg of an isotope with a half-life of 3.8 days How much of the…

A: Given- Initial mass = 2.90 g Half life = 3.8 days To find- mass of the isotope in grams remaining…

Q: Cesium-137 is radioactive and has a half life of 30. years. How much of a 1.70 mg sample would be…

Q: Iodine-125 has a half-life of 60.4 days and is used in radiation therapy to treat prostate cancer…

A: Since Iodine will decay as it is radioactive. And since decay reactions are first order reactions…

Q: Seaborgium-266 is a radioactive metal that does not occur naturally and only a few atoms have ever…

A: Answer:- This question is answered by using the simple concept of calculation of number of protons…

Q: Phosphorus-32 has a half-life of 14.0 days. Starting with 8.00 g of 32P, how many grams will remain…

A: Given Initial amount (N०) = 8.00 g Half life (t1/2) = 14 days time (t) = 42 days

Q: PET studies require fluorine-18, which is produced in a cyclotron and decays with a half-life of…

A: The decay process has an exponential decay, which in this case means that every 1.83 hours, half the…

Question

One of the radioactive isotopes used in chemical and medical research is iodine-125, which has a half-life of 61 days. How long would it take for 0.25 g to remain of a 1.00 g sample of iodine-125?

A) 244 days
B) 122 days
C) 61 days
D) 31 days

Explanation: The question is asking how much time it will take for a 1.00 g sample of iodine-125 to decay to 0.25 g. Since the half-life of iodine-125 is 61 days, it takes one half-life (61 days) for the sample to reduce to 0.5 g, and another half-life (61 days) for it to reduce to 0.25 g. Therefore, the total time is two half-lives, equating to 122 days (answer B).

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

Krypton consists of several radioactive isotopes, some of which are listed in the following table. Isotope Half-life Kr-91 8.57 s Kr-89 3.15 min Kr-79 35.04 h Kr-81 2.29x105 yr Which of these isotopes is most stable and which isotope is "hottest"? Kr-81 is the most stable because it has the longest half-life, whereas Kr-91 v is the hottest (least stable) since it has the shortest v half-life. How long does it take for 87.5% of each isotope to decay? Kr-91 Kr-89 min Kr-79 h Kr-81 yr
3. Suppose a sample of carbon-243 has a half-life of 3427 years. How long does it take for 80% of a sample of carbon-243 to decay?
Sodium-24 has a half-life of 14.8 hours. How much of a 346.3 mg sodium-24 sample will remain after 3.7 days? mass remaining: mg
Iodine-131 is radioactive and has a half life of 8.04 days. What percentage of a sample would be left after 30.9 days? Round your answer to 2 significant digits. U % 0 x10
I Review Constants | Periodic Table Part A Phosphorus-32 has a half-life of 14.0 days. Starting with 4.00 g of P, how many grams will remain after 56.0 days ? Express your answer numerically in grams.
What are the isotopes of carbon? How are these used in radioactive dating?
What is the mass of 35.5 micrograms of uranium-235 after 1.12 billions years. Uranium-235 has a half-life of 700 million years
The radioactive decay of thallium−206 to lead−206 has a half-life of 4.20 min. Starting with 5.60 ×1022 atoms of thallium−206, calculate the number of such atoms left after 42.0 min. Enter your answer in scientific notation.
lodine-125 is a radioactive isotope commonly used in medicine. It has a half-life of 59.5 days. A sample contained 2.00 kg lodine-125 when it was made. How old is the sample when it contains 0.0625 kg Iodine- 125 (in days)?
Hydrogen-3 is radioactive and has a half life of 12.3 years. How long would it take a sample to decay from 5.10mg to 2.30 mg. Round your answer to 2 significant digits
Iodine-125 is a radioactive isotope commonly used in medicine. It has a half-life of 59.5 days. Suppose at the start of Day 1 you store 3.77 kg of Iodine-125 in a cabinet and do not use it. After 119 days, how much Iodine-125 will you have (in kg)?
Cobalt-58 which is radioactive, has a half-life of 71 days. How much of a 48 g sample would remain after 284 days?