A 7.5 gram sample of Sr-90 was formed in 1960. The half life is 28 years. In what year will only 0.9357 grams remain? Show work

Q: Carbon-14 has a half-life of 5730 yearsyears. In a plant fossil, you find that the 14C14C has…

A: Given information is as follows: Half life t12=5730 years Initial amount A0 = 1.00 g Final amount  A…

Q: Find the initial amount of a radioactive element with a half-life of 21.7 hours, when the remaining…

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Q: 1- Nuclear Chemistry For the three major modes of radioactive decay: a. List the modes b. Give a…

A: Part AThe three major modes of radioactive decay are alpha, beta and gamma decay.

Q: Radium-223 dichloride (also called Xofigo) with a half-life of 11.4 days has been approved by the…

A: Half life for a radioactive element is defined as the time taken some initial amount (concentration)…

Q: Given 100.0 grams of a sample that has a half life of 7.02 days, determine the time in days for…

A: Such type of reaction follows 1st order kinetics. t=logAoAtlog2× t1/2

Q: Ernest Rutherford (the first New Zealander to be awarded the Nobel Prize in Chemistry) demonstrated…

A: I am solving only first three parts of the question as per the guidelines.

Q: . A radioactive isotope has a half-life of 10 years. What fraction of the original mass will remain…

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

Q: Phosphorus-32 is radioactive and has a half life of 14.3 days. How much of a 9.00 mg sample would be…

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Q: Tin-129 is radioactive and has a half life of 2.23 minutes. What percentage of a sample would be…

A: Given Half Life = t1/2 = 2.23 minutes  By using Formula kt1/2 = ln 2k * 2.23 minutes = 0.693k = 0.31…

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

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Q: A radioactive isotope has a half-life of 12.0 seconds. How much of a 100 gram sample is left after…

A: Given  Half life of radioactive isotope ( t1/2 )  = 12 second  Initial Mass of sample   ( A )0 = 100…

Q: Consider a radioisotope "X" with a half-life of 46.1 years. Determine (to the nearest 0.1 mg) how…

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Q: How many protons does Promethium-145 have? b). How many neutrons does Promethium-145 have?…

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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: 32.  A specimen of charcoal found contains 57% as much 14C as a sample of present day charcoal. What…

A: Given : Half life = 5700 years

Q: pile of radioactive material with a half-life of 10 years needs to sit until 0.0039 of the original…

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Q: If we start with 1000 radioactive parent atoms and a half-life of 50 years. How many parent atoms…

A: Given,  Initial concentration = 1000 atoms       t12 = 50 years   To find = concentration after 200…

Q: Find whether 6429 Cu is stable or not. If not, find the decay mode. Given: M(0“Cu) = 63.929766 amu…

A: Isotopes of an element have same atomic number but different mass number. Radioactive isotopes are…

Q: The Br-82 nucleus has a half-life of about 1.0 × 103 minutes. If you wanted 3.6 g of Br-82 and the…

A: Unstable nuclei can emit radiations and attain stability by transforming into another nuclei. This…

Q: How much of a 500g sample of K-42 is left after 37.2 hours if the half-life of K-42 is 12.4 hours?…

A: The radioactive decay follows first-order kinetics. We know that the half-life of  K-42 is 12.4…

Q: a 45.91 mg sample of a pure radioisotope has a half-life of 52 days, what will be the mass of the…

A: Given 45.91 mg sample of a pure radioisotope has a half-life of 52 day mass of the original…

Q: The half-life of radium-226 is 1600 years. Suppose we have a 27-mg sample. (a) Find a function…

A: As this is multiple question , first three part is solved here. Please re-post last one as an…

Q: Tin-129 is radioactive and has a half life of 2.23 minutes. Calculate the activity of a 1.2 mg…

A: Given  Half-life of Tin-129 = 2.23 minutes = 2.23 x 60 = 133.8 seconds Mass of the sample = 1.2 mg =…

Q: The radioactive isotope carbon-14 is used for radiocarbon dating. The half-life of carbon-14 is…

A: Carbon Dating using data from the question and calculating the age of the sample

Q: The half-life of cesium-137 is 30 years. Suppose we have a 12-g sample. (a) Find a function  m(t) =…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: Iodine-131 is radioactive and has a half life of 8.04 days. How much of a 8.90mg sample would be…

A: Half life tells you about the intervals when your initial sample will get halved.

Q: Compute the binding energy of the 7Li nucleus; the experimentally determined mass of 7Li is 7.016004…

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Q: 1Which scientists influenced the progression of the atomic model? (Check all that apply)…

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

Q: PART III. PROBLEM SOLVING: Solve what is asked and express your answers in four decimal places. Show…

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Q: 100- Using the graph to the right, answer the following questions. 90- 80- 4. What is the half-life…

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Q: A particular radioactive isotope has a half-life of 3. weeks. What fraction of the original sample…

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Q: 5) Bismuth-210 has a half-life of 5 days a) A sample originally has a mass of 800 mg. Find the…

A: All radioactive disintegrations are first order reactions. For a first order reaction, half-life is…

Q: 2. Strontium-90 has a half-life of 28 years. If a sample was tested in 1980 and found to be emitting…

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Q: How old is a skeleton that has lost 40% of its carbon-l4? Use 5,73A years as the half life of…

A: NOTE : There is a typing error in the half life of C-14 It will be 5730 year

Q: After 24 days, 2.0 mg of an original 128 mg sample remain. Find the half-life of the sample. a. 2…

A: Given: Initial amount of sample = 128 mg Remaining amount of sample = 2.0 mg Time elapsed = 24 days

Q: Q2) What are the 4 fundamental forces?

A: "Since you have asked multiple questions, we will solve the first question for you ( as per our…

Q: The half-life of 14C is 5730 yr. Find the number of disintegrations per hour emitted by 1.0 mol of…

A: half-life of 14C is 5730 yr.

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: The half-life of thorium-243 is 24 days. If a sample contains 8 units, how much will remain after…

A: All radioactive decay follow first order kinetics.

Q: If T1/2 ( half-life) of such radiant substance is 2 d. The amount will be remain after 8 d is 2 mg…

A: After the passage of each half life one- half of the sample remains. So after one half life 1/2 of…

Q: Show your work on all math questions! 1. You are given a 50.00-gram sample of an unknown isotope at…

A: Nuclear reactions are first order reactions. Write the formula for calculating the decay constant of…

Q: what is the product formed from 232Th by a-particle emission? a) 228Th b)232Ac c)232Ra d)228Ra…

A: In a emmision of alpha decay mass number change by four unit and atomic number change by two unit in…

Q: Tin-129 is radioactive and has a half life of 2.23 minutes. What percentage of a sample would be…

A:

Q: QB - An alien visited our planet in year 5305 and found that humans have long gone from this planet…

A: Given: Mass of 226Ra = 2.5 g. Mass of 206Pb = 6.8 g. And the half-life of decay = 1640 years.

Q: The half-life of 14C is 5730 years. A sample contains 90.8 % of the 14C that it would contain if it…

A: Age of a given sample can be calculated using Carbon dating method :

Q: A specimen of charcoal found contains 57% as much 14C as a sample of present day charcoal. What is…

A: Radioactive decay follows the first-order kinetics. The decay constant (λ) and half-life of a…

Q: Sr-90 has a half-life of 28.8 years. Beginning with 15.0 of Sr-90, how much will remain after 145…

A: Determination of rate constant, K:

Q: If 100 grams of radioactive carbon-14 are stored in a cave for 1000 years, how many grams will be…

A: Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration or nuclear…

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.