1. Figure 3 shows the measured decrease in activity for a pure sample of a specific isotope of plutonium.The measurements are provided in the data file and you may assume an error of 0.2 Ci for each point.Determine the following:(a) The half-life of the plutonium isotope.(b) Identify the specific isotope (i.e. the atomic mass).(c) Calculate the mass (in kg) of the radioactive sample at the t = 0 and t = 200 d.回日回Activity [CI]2520-15-$10-50255075100time (days)"125 150175 200Figure 3: Decay curve for a sample of Plutonium.Total: 10

Answered: 1. Figure 3 shows the measured decrease…

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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(5) The half life of sodium-24, which diminishes by first order radioactive decay, is 15.0 hours. A sample is administered to a patient to trace blood circulation. How long after the test would only 8.36% of the sodium-24 remain?
2) The half-life of Carbon-14 is 5730 years. i) Find the value r so that A(t) = A0e-rt gives the amount of Carbon-14 in a sample, where A0 is the %3D original amount of Carbon-14 in the sample. ii) A piece of parchment from an archeological site is analyzed, and found to have 62% of its original Carbon-14. How old is the parchment?
The 4520Ca has a Half-Life t1/2 of 163 days. the value of the radioactive constant λ in day-1 is:
8. Strontium-90 has a half-life of 28 days.nl bar (a) A sample has a mass of 50 mg initially. Find a formula for the mass remaining after t days. (b) Find the mass remaining after 40 days. llow 2 (c) What is the rate of decay after 40 days? (d) How long does it take the sample to decay to a mass an of 2 mg?
You are working in a facility with a linear accelerator which may be used to measure the level of C in a variety of samples (vegetable, mineral and animal). An archaeologist working on a dig on Stewart Island brings you a plece of an artifact found at the site and asks you to age it for them. You find that that the sample contained wood that had only 53% of the "C found in living trees. The half-life for radioactive decay of C is 5730 yr (it emits B-rays with an energy of 0.16 MeV). What is its age? [c]-["c), expl-kt)
Radioactive rhodium-99 decays with a half-life of 16.1 days. (a) What is the value of k in s-¹? S`1 (b) A sample contains 22.0 mg ⁹⁹Rh. How many decay events will be produced in the first second? Assume that the atomic mass of 99Rh is 99.0. decay events (c) A chemist obtains a fresh sample of 99Rh and measures its radioactivity. She then determines that to do an experiment, the radioactivity cannot fall below 25.0% of the initial measured value. How long does she have to perform the experiment? days
A 56.6 mg sample of sodium perchlorate contains radioactive chlorine-36 (whose atomic mass is 36.0 amu). Part A If 29.6% of the chlorine atoms in the sample are chlorine-36 and the remainder is naturally occurring nonradioactive chlorine atoms, how many disintegrations per second are produced by this sample? The half-life of chlorine-36 is 3.0×10^5 yr
he cloth shroud from around a mummy is found to have a 14C activity of 9.3 disintegrations per minute per gram of carbon as compared with living organisms that undergo 16.3 disintegrations per minute per gram of carbon. Part A From the half-life for 14C decay, 5715 yr , calculate the age of the shroud. Express your answer using two significant figures. Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type t = yr
Q represent a mass (in grams) of carbon , whose half-life is 5715 years. The quantity of 1 carbon 14 present after t years is Q = 10() t/5715 How long will it take until only 4 grams2remain? how do I do this and what equation do I use?
The cloth shroud from around a mummy is found to have a 14C14C activity of 8.7 disintegrations per minute per gram of carbon as compared with living organisms that undergo 16.3 disintegrations per minute per gram of carbon. From the half-life for 14C14C decay, 5715 yryr, calculate the age of the shroud. Express your answer using two significant figures.
A decay sequence for a radioactive atom of radon 219 to stable lead 207 atom is as shown below. (i.) What particle is emitted when 21183Bi is decays?(ii.) What happens within the nucleus to cause this decay?(iii) The half-life of 21986Pb is 4.0s. At time t = 20 s, what fraction of radon atoms present at time t = 0, will be undecayed?
An unknown radioactive element decays into non-radioactive substances. In 440440 days the radioactivity of a sample decreases by 3737 percent.(a) What is the half-life of the element?half-life: (days)(b) How long will it take for a sample of 100100 mg to decay to 6060 mg?time needed: (days)

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