Calculate the time required for 23.40 % of a sample of 110X (t1/2 = 15.2 h) to decay. Use the formula with 0.693 instead of ln 2.

Q: How many years after 106Ru is implanted in the eye does it take for its decay rate (or activity) to…

A: Solution  -

Q: The most abundant radon isotope is radon-222, which is an alpha emitter with a half-life of 3.8…

A: Given - Half life of Radon-222 = 3.8 days            Initial level/amount 0f Rdon-222 = 500 Bq m-3…

Q: The fraction of a radioactive isotope remaining at time tis  (1/2)t/t1/2, where t1/2is the…

A: Given: a) Fraction of Carbon-14 in a piece of charcoal after 10.0 yr is calculated as shown below,

Q: Co-60 is used extensively in radiotherapy as a source of y-rays. Its half life is 5.27years. a) How…

A: half life = 5.27 years

Q: Krypton-87 has rate constant of 1.5 x 10 -4 / s. What is the activity of a 2.0 mg sample?

A: Welcome to bartleby ! Introduction : We have to calculate activity of sample

Q: How much time is required for a 6.25-mg sample of 51Cr to decay to 0.75 mg if it has a half-life of…

A: The initial amount of the sample = 6.25 mg The amount of sample after time t = 0.75 mg. The…

Q: In a treatment that decreases pain and reduces inflammation of the lining of the knee joint, a…

A: Initial count (No) = 1100 per second Final count (Nt) = 1.14 per second Time (t) = 24 hours

Q: An old piece of wood has a carbon-14 content of 0.0156 times that 14 is the age of the old wood if…

A: We will use first order kinetics formula

Q: c- A freshly prepared sample of a certain radioactive isotope has an activity of 10 mCi. After an…

A:

Q: Radium 223 decays with a half life of 11.4 days. How long will it take for a 0.240mol sample of…

A: Half life of radioactive elements is given by    t1/2 =0.693λ      λ = disintegration constant.…

Q: You take a course in archaeology that includes field work. An ancient wooden totem pole is excavated…

A: Given: The beta decay rate is measured at = 690 decays/min. sample from the totem pole contains =…

Q: If 2.8x10-10% of the atoms of a radioactive isotope disintegrate in 1.0 yr, what is the decay…

A: As the radioactive decay is first order reaction, the expression is given as, Here,  N0 indicates…

Q: If the half-life of a radioactive element is 30.0 years, how long will it take to decay to the point…

A: For the first order reaction we have the formula as : k*t = ln(A/At) Where A is the initial…

Q: How many hours until the isotope decays to 1.56 x 10-3 mg?

A:

Q: Fluorine-18 is a radioactive isotope commonly used in medicine.  It has a half-life of 110 minutes.…

A:

Q: 238U 92 234TH +He 90

A:

Q: Silicon-32 is a beta emitter with a half-life of 650.0 years. How long would it take for a 8.00g…

A:

Q: What decay mode and daughter nucleus are expected for 27P? OA. We expect the 27p to decay by…

A: 1.)  Beta minus decay takes place when number of neutrons are in excess.  Beta plus decay takes…

Q: Calculate the time required for 52% of a sample of A (t1/2 = 7510 y) to decay.

A: Given that : The half-life of sample A (t1/2)= 7510 y We have to calculate the time required for 52%…

Q: The half-life of Po-218 is 3.05 minutes. How many minutes does it take for a sample of Po-218 to…

A: Given: Half-life of Po-218 = 3.05 minutes. And the final amount of Po-218 isotope remaining = 2.35 %…

Q: How many half-lives have passed in each of the following situations? (a) Initially the sample is…

A: SOLUTION: Step 1: (a). Half-life is the interval of time required for one-half of the atomic nuclei…

Q: Technecium-99m is a meta-stable isotope used for medical diagnostic purposes. Which of the following…

A: * Correction: in option b it should be Te4399 instead of Te4392. Technetium was the first element…

Q: A wooden artifact is subjected to radiocarbon dating. The activity associated with its 14C content…

A: Since the decay reactions are first order reactions. Hence the relationship between the activity and…

Q: Caesium-137 decays via β - emission with a half-life of 30.17 years. A sample is initially measured…

A:

Q: Calculate the time required for 21.80 % of a sample of 190X (t1/2 = 460.0 h) to decay. Use the…

A: Relation between t1/2 and decay constant k for radioactive decay: k = 0.693/t1/2  t = 2.303/k…

Q: 40K decays to 40Ar with a half-life of 1.27 x109 years.  The age of a mineral sample that has a mass…

A:

Q: 1.What is the half-life of 99Tc if a 500.0 g sample decays to 62.5 g in 639,000 years 2)How much of…

A: Given,Mass 500 g,Therefore, the first half-life is 250.0g.Second half-life is 125.0g.Third half-life…

Q: Fluorine-18 (5F) has half-life t/2 = 110. minutes. (a) What percentage of *F-sample remains after…

A: Given,          Half life of the element (t1/2) = 110 minutes = 110 x 60 s = 6600 s          Time…

Q: How long does it take for 105 mg of tritium H to decay to 35.0 mg? The half-life of tritium is 12.3…

A: All radioactive decays are first order reaction.

Q: The half-life of 1311 is 8.04 days. (a) Convert the half-life to seconds. (b) Calculate the decay…

A:

Q: You take a course in archaeology that includes field work. An ancient wooden totem pole is excavated…

A: The age of the sample is calculated as: Age=n×t12 where n is the number of half lives and t1/2 is…

Q: Technetium-99 (atomic mass - 98.9 amu) is used  for bone scans. It has a half-life of 6.0 h. What is…

A:

Q: The Q value for the alpha decay of Tl203 is calculated to be 0.91 MeV from the masses of the initial…

A:

Q: The hydride of an unstable nuclide of a Group IIA metal, MH2 , decays by α-emission. A 0.025 mol…

A:

Q: 21.2) Calculate the time required for 62.40 % of a sample of 243X (t1/2 = 290.4 h) to decay. Use…

A: The radioactive decay process follows the first order kinetics.  Given: Percent of sample decayed =…

Q: Neptunium-237 has a half-life of 2.1 million years. The amount N of 400 kilograms of neptunium-237…

A: Exponential decay According to decay law, it calculates the amount of undecayed nuclei in a…

Q: If 2.8X10⁻¹⁰ % of the atoms of a radioactive isotope disin-tegrate in 1.0 yr, what is the decay…

A: Radioactive decay at a distinctive rate, irrespective of the chemical substance within which they…

Q: Cobalt-60 has a half-life of 5.27 years. How long will it require for 10.5 mg of a 22.8-mg sample of…

A: Correct Option :  b. 4.71 y

Q: (c ) Iodine-131 has a half-life of 8 days. How many grams of I-131 in a 4.0 g sample remain after…

A: (c) The amount of the isotope that remains after given decay time is calculates by using below…

Q: (A). Sodium-24 has a decay constant of 4.63 x 10-2 h-1. What is its half life? (B) The half life of…

A: Given that,decay constant = λ  = 4.63x10-2 hr-1   t1/2 = ln 2λ where t1/2 is the half life t1/2 = ln…

Q: The radioactive isotope 212Pb has a half-life of 10.64 h. A sample containing this isotope has an…

A:

Q: Krypton-87 has  a rate constant of 1.5 * 10-4 s-1. What is the activity of a 2.00 mg sample?

A: The activity of a sample of radioactive matter is defined by the number of disintegrations taking…

Q: Krypton-81m Whole-body scan for tumors Mode of Decay Isotope Half-life Use in Medical Imaging B+, y…

A: All radioactive decay reactions follow first order kinetics. For first order reaction, half-life…

Q: You take a course in archacology that includes field work. An ancient wooden totem pole is excavated…

A: The above question can be solved using the formula  t1/2 = 0.693/k Where k is the rate constant k=…

Q: Fluorine-18 is a radioactive isotope use in a variety of medical imaging procedures including…

A: Half-life of 18F isotope = 1.83 hours

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.