A particular isotope of an element has a half-life of 56 days. What percentage of the sample will remain after 300 days? O 2.4% O 98.8% 81.3% 18.7% 56.7%

Q: If 1 g of an isotope has a half life of 15 hr, the half life of 0.5 g sample is A. 15 hr B. 30 hr C.…

A: 1 g sample of an isotope has a half - life = 15 hr 0.5 g sample of an isotope has a half - life =?…

Q: For each of the following, indicate if the number of half-lives elapsed is: a sample of Ce−141 with…

A: Half-life means the time required for a quantity to reduce to half of its initial quantity value. It…

Q: The half-life of the radioactive isotope 137Cs is 30.17 years. How long does one have to wait until…

A: To solve this problem we have to first calculate the rate constant of the reaction using half life…

Q: Sodium-24 has a half-life of 14.8 hours. How much of a 553.8 mg553.8 mg sodium-24 sample will remain…

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Q: If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of…

A: Given : Half life of I-131 = 8 days Initial amount of I-131 = 10 mg And time passed = 24 days

Q: Carbon-11 is used in medical imaging. The half-life of this radioisotope is 20 min. What percentage…

A: redioactive decay process follows 1st order Kinetics. The intgrated ratelow for 1st : order…

Q: 2Tritium H-3 has a half-life of 12.3 years. If a sample of 3 g of H-3 is produced, what will be the…

A: The radioactive decay of a substance is a first-order reaction. During this process, a heavy metal…

Q: A particular isòtope of an element has a half-life of 75.0 hours. What percentage of the sample will…

A: All isotopic decomposition follows the first order reaction kinetics. So using integrated rate…

Q: 18. Americium - 241 has a half life of 432 years. If you have 25g of Americium - 241, how much will…

A: Given : Half life (T) = 432 years Mass (No) = 25 grams  Time (t) = 864 years Mass left after 864…

Q: Substance X has a half-life of 20 days. If a sample is originally 12 g, how much will be left after…

A: Half-life means that after that many days, only half of the sample is left. So if we start with 12…

Q: Complete the table for the radioactive isotope. Isotope 239 Pu, Half Life (In years) 24100, Initial…

A: The amount of time required by an element to reduce to half its quantity is called its half-life.

Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A: The spontaneous breakdown of the nucleus causes the release of energy and matter from the nucleus,…

Q: lodine has a half-life of 8.07 days. What fraction of a sample of iodine-131 will be left after…

A: The given information is as follows: The half life of the Iodine = 8.07 days The fraction of sample…

Q: A theoretical isotope X-100 has an initial mass of 500g. This isotope has a half-life of 8 hours.…

A: GivInitial mass=500g Half life=8 hours

Q: Phosphorus-32 is radioactive and has a half life of 14.3 days. What percentage of a sample would be…

A: Given,Half-life of Phosphorus-32 = 14.3 days.Percentage of sample left after 31.7 days has to be…

Q: Element X has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10…

A:

Q: 2Bi is a radioactive isotope of the element bismuth with a half-life of 19.7 minutes. What…

A: Given: half-life of isotope of bismuth is 19.7 minutes.

Q: If the half-life of a radioactive substance is 500 million years and you have 48 atoms of it, how…

A:

Q: If you have a sample of radioactive material that weighs 2 grams, and only 1 gram is left that is…

A: Initial nuclei = 2 grams. Reduced nuclei = 1 grams. Time = 5 years. Half life time of material = ?

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

A:

Q: A is a radioactive substance with a half-life of 2 hours. B is a radioactive substance with a…

A: Introduction: Radioactive decay reaction follows first-order reaction kinetics. In this case,…

Q: If you are given a sample of 14 g of a radioactive substance and waited for 4 half-lives to pass,…

A:

Q: How much of a 560-mg sample of a radioactive substance is left after 102 years if the half-life of…

A: Half life of any substance is defined as the time taken to reduce the initial concentration to its…

Q: Technetium-99 (half-life = 6.0 h) is used in medical imaging. How many half-lives would go by in 18…

A: technetium - 99 have half life = 6 hours

Q: Question 8 of 10 If the half-life of uranium 235 is 700 million years and you have 64 atoms of it,…

A: Half life time is the time required to decompose the radioactive atoms to its half of its initial…

Q: Barium−131 is a radioisotope used to study bone formation. A patient ingested barium−131. How much…

A: The time in which half of the initial amount of the reactants convert into the product known as half…

Q: Samples of the following isotopes in pure form, each containing the same number of atoms, are taken.…

A:

Q: lodine-131 has a half-life of 8.1 days. How much of 2 g of the isotope will remain after 56.7 days?…

A: The nuclear half-life of a radioactive isotope tells you how much time must pass in order for half…

Q: Iodine-131 is often used in nuclear medicine to obtain images of the thyroid. If you start with…

A: We have given that  Iodine-131 is often used in nuclear medicine to obtain images of the thyroid. If…

Q: Carbon 14 decays to carbon12. The half-life of the C14 isotope is 5730 years. 3000 years after an…

A:

Q: The half-life time of a radioactive element is 6.0 days. A sample of 50.0 g of this element is…

A:

Q: 19. The half-life of the radio-isotope iodine - 131 is 8 days. What fraction of the original iodine…

A: Half life of the reaction is the time in which the reactant becomes half of the initial reactant. It…

Q: 90 The half-life of "Sr is 28 years. How long will it take for a given sample of "Sr to be 83%…

A: 1) half life = 28 years  Decomposed = 83 %  2) half life = 39.4 days

Q: Lead-200 has a half-life of 21.5 hours. Starting with 1.96 mg of this isotope, how much O 0.110 mg…

A: We will use first order kinetics formula

Q: If the half-life of a particle is 2 days, how much of this substance remains after 8 days? Select…

A: Since you have posted multiple questions, we are entitled to answer the first only. Given: Half-life…

Q: A 120-mg sample of technetium-99m is used for a diagnostic test. If technetium-99m has a half-life…

A: The basic formula for half life equations is A= amount remainingP= original amountt= elapsed…

Q: Technetium‑99m, an important radionuclide in medicine, has a half‑life of 6.0 hours. What percentage…

A: Using concept of half life time.

Q: Carbon-11 is a radioactive isotope of carbon. Its half-life is 20.3 minutes. What fraction of the…

A:

Q: The isotope Ga-68 has a half-life of 68 minutes. If a diagnostic test is begun with 15 mCi of this…

A:

Q: Substance Q initially weights 120% of its remaining mass after its decay in 60 minutes. What is its…

A: Given  substance Q initial weight =120% of its remaining mass after its decay for 60 mins t=60…

Q: lodine-131 has a half-life of 8. l days. How much of 2 g of the isotope will remain after 56.7 days?…

A: Half-life of iodine = t1/2 =  8.1 days intial amount = A0 = 2 g  final amount = A =  ? g  Time given…

Q: Can someone help me solve these problems?

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: If the half-life of a radioactive element is 219.3 years and the atomic weight of the radioactive…

A: The number of decay in 1 second for 1 gram sample of a radioactive element is known as Specific…

Q: What is the half-life of Californium- 252 based on the graph below?

A:

Q: Half-life of Element X mass of 60 How much of the parent isotope exists after 3 half-lives? Element…

A: Initial mass of element = 100

Q: Co is used in radiotherapy and has a half-life of 5.26 yr. How long does it take for a sample of 0…

A:

Q: 1) P-32 has a half-life of 14.3 days. How many milligrams of phosphorus-32 remain after 57.2 days if…

A: Half-life = 14.3days Initial mass = 4.0mg You will be left with half of initial mass after 14.3 days…

Q: Cesium-131 has a half-life of 9.7 days. What percent of a cesium-131 sample remains after 64 days?…

A:

Q: A rock contains the radioactive isotope K − 40 that decays with a half-life of 1.3 billion years and…

A: Answer: Nuclear reactions are first order reactions, therefore integrated rate law of first order…

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.