A sample of an alpha emitter having an activity of 0.18Ci is stored in a 25.0-mL sealed container at 22 °C for 245days. (a) How many alpha particles are formed during thistime? (b) Assuming that each alpha particle is converted toa helium atom, what is the partial pressure of helium gas inthe container after this 245-day period?

Q: 4. Indicate with a plus sign (+) any of these processes that require energy, and a negative sign (-)…

A: Some process, energy is required. For some process, energy is released depending upon the particular…

Q: The half-life of bismuth-210, 210Bi, is 5 days. (a) If a sample has a mass of 216 mg, find the…

A: The decay of radioactive elements follows first order kinetics. So we would use first order reaction…

Q: A dinosaur remain has a C-14 isotope and has a half-life of 5,715 years. The activity of this is…

A:

Q: 2) What is the activity of a 1 gram sample of 1? (t12 = 3.38 x 10' seconds)

A:

Q: A sample of cobalt-60 was labelled as having an activity of 3.25mCi, but upon inspection, it…

A: Co-60 is used medically for radiation therapy as implants and as an external source of radiation…

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: A patient receives 9.0 ng of a radioisotope with a halflife of 12 h. How much will remain in the…

A: Radioactive elements are those which undergoes the spontaneous reactions (may be fusion or fission)…

Q: The carbon-14 activity of an artifact from a burial site was 9.2 min'gl. The half-life of carbon-14…

A: The C-14 decay reactions are first order reactions. Since we know that the relationship between the…

Q: One of the radioactive isotopes used in medical treatment or analysis is iron-59. The half-life of…

A: Radioactive decay obeys first order decay kinetics   At=Aoe0.693t12×twhereAt= final activityAo=…

Q: A wooden artifact is burned and found to contain 21 g of carbon. The 4C activity of the sample is…

A:

Q: Explain what is meant by (a.) radioactivity (b.) half-Ilfe Why is it necessary to specify the…

A: a) Radioactivity is a process or phenomenon of disintegration of unstable nucleus into stable…

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

A:

Q: 7. If we start with 1.000 g of strontium-90, 0.953 g will remain after 2 years. (a) What is the…

A: Reladioactive decay reactions are first order reactions which can be solved as follows using…

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: 8. Patients with Graves disease have an overactive thyroid gland, and are commonly treated with…

A: Given the half-life of I-131, t1/2 = 8.0 days Initial activity, Ao = 9.9 mCi

Q: A sample of uranium ore contains 5.37 mg of U-238 and 2.52 mg of Pb-206. (a) Calculate the…

A: Given mass of U-238 = 0.00537 g Number of moles of U-238 = 0.00537/238 = 2.26 × 10-5 mol Given mass…

Q: A mammoth skeleton has a carbon-14 decay rate of 0.48disintegrations per minute per gram of carbon…

A: Radioactive disintegration follows first order reaction and decay rate equation can expressed as,…

Q: What is the half-life of thallium-210 if 2.40 minutes are required for the activity of a sample of…

A:

Q: The atomic masses of hydrogen-2 (deuterium), helium-4,and lithium-6 are 2.014102 amu, 4.002602 amu,…

A: Since we answer only upto 3 sub-parts, we'll answer first three. Please resubmit the question and…

Q: Which of the following radioactive nudlei is most likely to decay via emission of a B particle? (a)…

A: Given: The radioactive nuclei which decay via emission of  β- particle is asked. The given nuclei…

Q: Question 1:  If the reaction is zeroth order or second order, you can not calculate the half life.…

A: We need to explain why if the reaction is zeroth order or second order, we can not calculate the…

Q: A certain amount of a sample of 96x has an activity of 0.1026 µCi. In 8.0 days, the activity of the…

A:

Q: write a nucler reactiun to tepresent cobalt-60 decaying to nickel -60 plus a beta particle plus 9…

A:

Q: An ancient skull has a carbon-14 decay rate of 0.85 disintegrationsper minute per gram of carbon…

A:

Q: The radioactive isotope 8P decays by positron emission. If the mass of a sample of phosphorus-28…

A:

Q: Correct answer

A: The given graph of the quadratic is of a parabola. We know that, the general equation of a parabola…

Q: Randon gas has atomic number 86 and mass number 222. Randon is radioactive and decays via alpha-…

A: Given: Randon gas has atomic number 86 and mass number 222. Randon is radioactive and decays via…

Q: (c) What is the energy released (in both MeV and J) when a single radium-224 atom undergoes alpha…

A: Answer -

Q: A 65-kg person is accidentally exposed for 240 s to a 15-mCi source of beta radiation coming from a…

A: Data, 1 becquerels (Bq)=1  dis/s                     1 mCi=10-3Ci                        1…

Q: 90Sr is one of the most deadly products of nuclear fi ssion. Assume that 4% of the fi ssion fragment…

A:

Q: Some mammoth bones found in Arizona were found by carbon-14 dating to be 1.13 x 10 4 y old. What…

A: The formula for decay of radioactive material is Nt = No (1/2)t/t1/2 where, Nt = number of…

Q: 4.605 The time for 99% of a sample of a radioisotope to decay is given by the equation to.99 = k…

A:

Q: Which of the following radioactive nuclei is most likely to decay via emission of a b- particle? (a)…

A:

Q: Assuming that many radioactive nuclides can be consid-ered safe after 20 half-lives, how long will…

A: It is given that many nuclides can be considered safe after 20 half-lives. Given data: Half-life…

Q: If one-trillionth of the atoms of a radioactive isotope disin-tegrate each day, what is the decay…

A: One trillionth of radioactive isotope decay takes place in a day. I trillion = 1.0 x 1012  The…

Q: Complete the following equations with the correct particles and identify the mode of decay. (a) '0→…

A: Given,

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.