A 53.8-mg sample of sodium perchlorate contains radioactivechlorine-36 (whose atomic mass is 36.0 amu). If 29.6%of the chlorine atoms in the sample are chlorine-36 and theremainder are naturally occurring nonradioactive chlorineatoms, how many disintegrations per second are producedby this sample? The half-life of chlorine-36 is 3.0 x 105 yr.

Q: The activity of 30pg of 247Cm is nCI, Calculate the half-life of 247Cm in unit year. a. 1.55 x 1015…

A: According to Q&A guidelines of Bartleby, we are supposed to answer only the first question out…

Q: UCLEAR REACTIONS (10 PTS) 1. In an alternate universe where it is safe to consume radioactive…

A: Radioactive decay is a first order reaction. Note: According to Q&A guidelines of Bartleby, we…

Q: Substance D initially weights 56 grams. After 6 minutes, it was observed that its mass decreased by…

A:

Q: As recently as the late 1970s, some wrist watches were manufactured using tritium (3H) as a…

A: t1/2 of 3H = 4500 days 43 years ago, a watch was purchased.

Q: If a tree dies and the trunk remains undisturbed for 1.435 × 104 years, what percentage of the…

A: Cfinal / Cinitial = 0.5(time/half life ) where Cfinal = carbon content after time Cinitial = initial…

Q: Krypton-81 has a half-life of 2.29 × 105 years. A 750-mg sample of Krypton-81 undergoes electron…

A: Since you have posted a question with multiple sub-parts as per our company guidelines we are…

Q: trontium-90 is one of the products of the fission of uranium-235. This strontium isotope is…

A: Half life = 28.1 year Initial amount = 1.50 gm Final amount = 0.100 gm

Q: Please solve the following problem!A huge amount of radioactive iodine (131I) andcaesium(137Cs) was…

A: Please find the attached images.

Q: Radioactive cobalt-60 is used extensively in nuclear medicine as a ɣ-ray source. It is made by a…

A:

Q: The 14C in a bone has a disintegration rate of 4000 dis h1. The half life of 14C is 5730 years.…

A: The rate of disintegration is proportional to the number of atoms left after a time (N) as- Where…

Q: The amount of ",C still present at any time in the tree may be denoted as N and No, is the initial…

A:

Q: 31. A Yadio chemist prepames a cobalt sample 0.100 moks trom AS pert contrining of 58CO· As per…

A: Answer :-  Half-life of 58Co =  70.87 days…

Q: By mass spectral analysis, a sample of strontium is known to contain 2.64x1010 atoms of Sr-90 as the…

A: Answer to all the questions is given below.

Q: (d) How long does it take for 90% of a given quantity of the radioactive element cobalt-60 to decay,…

A:

Q: According to current regulations, the maximum permissibledose of strontium-90 in the body of an…

A:

Q: In living organisms, C-14 atoms disintegrate at a rate of 15.3 atoms per minute per gram of carbon.…

A:

Q: The half-life of 232Th is 1.4 x 100 yr. Find the number of disin- tegrations per hour emitted by 1.0…

A: Some nuclei are unstable and undergo a loss of energy in the form of radiation. This process is…

Q: One of the radioactive isotopes used in medical treatment or analysis is palladium-103. The…

A:

Q: takes 360 kJ to keep a 100-watt lightbulb burning for 1 hour. Assuming that the lightbulb won’t…

A: Mass defect of a atom is defined as the difference in the actual mass of the atom to the mass…

Q: The half life of a radioactive iodine is 8 days. How long will it take for 0.25 g of radioactive…

A:

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium- 67 is 78.2 hours.…

A: Given   The half-life is 78.2 hours. The fall in activity of gallium-67 is 29.1 percent of its…

Q: The isotope 166-Yb decays by electron capture with a half-life of 57 hrs. What percentage of the…

A: We have to calculate the percentage of isotope left

Q: Uranium-238 undergoes eight consecutive a-emissions to give stable lead. In an uranium ore sample,…

A:

Q: A radioisotope “X” has a half-life of 2.5 years. Determine (to the nearest 0.1 mg) how much of a…

A: All the radioactive reactions follow first order kinetics . The term half life is defined as the…

Q: A certain radioactive material contains 1010 atoms and has a half-life of 20 days. (i.) Calculate…

A: No of atoms in radioactive elements = N 1010 atoms Half Life = t1/2 = 20 days No of disintegration…

Q: The isotope 90/38 Sr is one of the extremely hazardous species in the residues from nuclear power…

A:

Q: The radioactive isotope rhodium-101 decays exponentially, with a half-life of 170 minutes. Suppose a…

A: A radioactive nuclei is generally unstable. It breaks down spontaneously as its binding energy is…

Q: The ratio between the number of tritium (13T; radio active isotope of hydrogen) and the naturally…

A:

Q: A breeder reactor converts relatively stable uranium 238 into the isotope plu- tonium 239. After 15…

A:

Q: A 1.00 L sample of water near a nuclear plant registered a 2.55 pCi of iodine–131. What is the…

A: The given data contains, half life =8 days. =8 days×24 hourday×60 minhour×60 shour =681200 s mass of…

Q: Thallium-201 is used medically to diagnose heart problems. What is the half-life of thallium-201 if…

A: Time = 128 hours  t1/2 = ?

Q: A 56.6 mg sample of sodium perchlorate contains radioactive chlorine-36 (whose atomic mass is 36.0…

A:

Q: If a tree dies and the trunk remains undisturbed for 1.195 × 10⁴ years, what percentage of the…

A: Carbon dating is a technique to estimate the age of the tree or rock

Q: 204.) Radon-222 gas can be found seeping from granite that contains uranium-238. Radon-222 is a…

A:

Q: Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The…

A: Radioactive decay is always a first order reaction. According to the first order radioactive decay…

Q: What is the half-life (in years) for a radioactive isotope with a rate constant of 6 yr1? Do not…

A:

Q: Actinium-227 is a radioactive substance that decays according to the following function, where v, is…

A: The relationship between the initial amount and final amount of reactant is given as, => y = y0…

Q: Americium-241 is widely used in smoke detectors. The radiation released by this element ionizes…

A: Answer:- this question is answered by using the simple concept of nuclear chemistry which involves…

Q: A 53.8-mg sample of sodium perchlorate contains radioactive chlorine-36 (whose atomic mass is 36.0…

A: radioactive nuclie undergo sponteneous decay reaction to produce stable products. The time for the…

Q: Radioactive cobalt-60 is used extensively in nuclear medicine as a ɣ-ray source. It is made by a…

A:

Q: Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET).…

A:

Q: Some watch dials are coated with a phosphor, like ZnS, and a polymer in which some of the 1 H atoms…

A: Given, The half-life of the tritium is t1/2=12.3 yr. Time t is 50 yr. The rate constant can be…

Q: Krypton-81 has a half-life of 2.29 × 105 years. A 750-mg sample of Krypton-81 undergoes electron…

A: A question based on nuclear chemistry that is to be accomplished.

Q: The half-life of element X is 500 years. If there are initally 8g of X how much will remain after…

A: The half-life of an element is the time it takes for half mass of the element to decay.

Q: Fluorine-18 undergoes positron emission with a half-life of 1.10 x 10- take for the amount of…

A: Solution :    Half-life is the time required to reduce the concentration of the compound to half of…

Q: A 120-mgmg sample of technetium-99 mm is used for a diagnostic test. If technetium-99 mm has a…

A: Solution -

Q: Some watch dials are coated with a phosphor, like ZnS,and a polymer in which some of the 1H atoms…

A: Given that : Half life of tritium = 12.3 yr Time period (t) = 50 yr Mass of tritium = 3.024 g

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.