24. A radioactive substance weighing 18.00 grams undergoes radioactive decay in 12.5 days and has only 0.562 grams remaining, what is the half-life of this substance? (8 Sam C.8 or TEI muies 25. A radioactive substance weighs1.0 gram after 40.0 minutes and has a half-life of 10.0 minutes, how much did it weigh initially? sw o

Q: Technetium-99m, a metastable state of technetium-99 commonly used in nuclear medicine, has a…

A:

Q: Skeletal remains had lost 85%of the C-14 they originally contained. Determine the approximate age…

A:

Q: # 4. The remnants of an ancient fire in a cave in Africa showed a 614decay rate of 3.9counts per…

A: Radioactive decay is a first order reaction. The integrated rate law for first order reaction is as…

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A: We have given The ratio of C-12 and C-14 in living organisms = Nt =  4.12 d/min-g The ratio of C-12…

Q: Fluorine-18 is an isotope used in PET scans. If a researcher has 1.5 micrograms of 18F, how long…

A: As radioactive decay is a first-order process and can be described in terms of either the…

Q: Torgeir is on a geology field trip and finds a meteorite that contains 10 times more argon-40 than…

A: Radioactive decay of material follows first order kinetics.  Half life is defined as the time…

Q: 9.) Strontium 90 is a major component of the detonation of nuclear explosives: it is I dangerous…

A: We know that no of atoms  N Present at time t  are given as N= N° e-kt where N° are the initial…

Q: 1. _Radioactive dating uses the half-life of different radioactive material to test the of a sample.…

A: 1.Nuclear stability radioactive dating uses the half-life of different radioactive material to test…

Q: At the beginning of an experiment, a scientist has 348 grams of radioactive goo. After 75 minutes,…

A: Radioactive decay follow first order kinetics. The integrated rate law for the first order reaction…

Q: 15. A mammoth skeleton has a carbon-14 decay rate of 0.48 disintegrations per minute per gram (0.48…

A:

Q: A 70.-kg person exposed to 90Sr absorbs 6.0×105 β- particles, each with an energy of 8.74×10-14 J.…

A: The given information is: Mass of the person = 70.0 kg Energy of particles = 8.74×10-14 J No. of…

Q: 2. If you have 100 grams ofa radioactive isotope with a half-life of 10 years a. How much of the…

A: GIVEN   half life =10 years we know half life (T1/2) =0.693K  , where k = decay constant  K= 0.69310…

Q: tled Section 46. The carbon-14 content of an ancient piece of wood was found to be one- sixteenth of…

A: we know Radioactive decay constant (K)= 0.693t1/2Given ,t1/2 = 5730 yearNow ,  K= 0.6935730…

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

A: The half life for a radioactive element can be defined as the time taken by the half of the material…

Q: 1. Which type of radiation (beta or gamma) is more penetrating?

A: Since you have posted multiple Questions in a single session, we are entitle to answer first…

Q: Yttrium-90 is a radioactive isotope used to treat tumors in the liver. 90 Y has a half-life of 2.67…

A: Given : Half life of 90Y = 2.67 days. And mass of 90Y remaining after 1.03 days = 4.02 µg

Q: A radioactive isotope has a half-life of 2.1 years. If 55.8 mg of the radioactive isotope is present…

A: Radioactive disintegration processes follow first order kinetics Given Half life (t12) = 2.1 years…

Q: What is the age of a fossil that has a carbon-14 decay rate of 6.5 disintegrations per minute per g…

A: Formula used y=a e-nt where y is the final  amount of death = 6.5dis/min           x is the initial…

Q: At the beginning of an experiment, a scientist has 244 grams of radioactive goo. After 105 minutes,…

A:

Q: Radioactive tungsten-178 decays with a half-life of 21.6 days. (a) What is the value of k in s-12…

A: Given: The half-life of tungsten-178, t1/2 = 21.6 days Seconds in a day are given as: 1 day =…

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

A:

Q: How many radioactive disintegrations occur per minute ina 0.0010-g sample of 209Po that has been…

A: We know, k=ln2t1/2k - decay constant and t1/2 is half life

Q: A radioactive sample contains 1.55 g of an isotope with ahalf-life of 3.8 days. What mass of the…

A: Radioactive isotopes may occur naturally or be artificially produced. Radioactive isotopes possess…

Q: Normal No Spacing Head 三三。 Paragraph Styles 22. A normal adult jawbone contains 200 mg of Carbon-14…

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Q: #5 A rock contains 0.257 mg of Pb-206 for every milligram of U-238.The half-life for the decay of…

A: Radioactive decay follows first order kinetics. The integrated rate law is as below: kt=lnAoA Here,…

Q: 3. A certain radioactive material is known to decay at a rate proportional to the amount present. If…

A: Solution -

Q: An analytical laboratory balance typically measures mass to the nearest 0.1 mg. What energy change…

A: Given : Loss of mass = 0.1 mg  Since 1 Kg = 1000 g  And 1 g = 1000 mg => 1 Kg = 106 mg Hence mass…

Q: Chemistry The 35S atom on a radiolabeled amino acid, methionine, has a half-life of 87.4 days. What…

A: In a radioactive element, the decay of the nucleus of the element takes place due to the imbalance…

Q: A sample initially contains 300 µg of 32Si (31.97415 amu), which decays with a half-life of 160…

A: The nuclear reactions are a type of chemical processes which lead to the formation of some new…

Q: Radioactive vanadium-48 decays with a half-life of 16.0 days. a. What is the value of k ins? b. A…

A: Radioactive decay is a spontaneous process. Radioactive decay is a first order reaction. Thus its…

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A: Sodium-24 is one of the isotope of sodium and  sodium-22, sodium-24 are radioactive isoptopes,…

Q: 5.) A sample of bone has a specific activity of 5.22 disintegrations per minute per gram of carbon…

A: Given:

Q: 2) The half-life of Carbon-14 is 5730 years. i) Find the valuer so that A(t) = A0e-rt gives the…

A:

Q: At the beginning of an experiment, a scientist has 192 grams of radioactive goo. After 90 minutes,…

A: Initial mass, final mass, time required for radioactive goo are given for which relevant questions…

Q: A laboratory rat is exposed to an alpha-radiation sourcewhose activity is 14.3 mCi. (a) What is the…

A:

Q: At the beginning of an experiment, a sclentist has 164 grams of radioactive goo. After 255 minutes,…

A: Given:Initial amount of goo, G∘= 164 gFinal amount of goo, G =5.125gtime, t =255m

Q: Bromine-88 is radioactive and has a half life of 16.3 seconds. What percentage of a sample would be…

A: Given,Half-life of Bromine-88 = 16.3 seconds.Percentage of sample left after 74.8 seconds has to be…

Q: How many half-lives have passed in each of the following situations? How much of a 48.0 g…

A: 1. The given half life of iodine-134 is 50 minutes. The total number of half-lives observed in 150…

Q: Q3: Complete the nuclear reaction below and calculate the threshold energy of reaction that is…

A: We have been asked to complete the nuclear reaction and to calculate the threshold energy kf…

Q: Strontium-90 is produced during the nuclear fission of uranium-235 and is part of nuclear fallout…

A:

Q: 5. A tree falls in a forest. How many years must pass before the carbon-14 mass in the tree's carbon…

A: Suppose Initial amount = Ao Amount at time, t = 3.125% Ao  Half-life, t1/2 = 5570 years

Q: A 70.-kg person exposed to ⁹⁰Sr absorbs 6.0X10⁵  β⁻ parti-cles, each with an energy of…

A: When a person is exposed to radiation of certain limit, it is not harmful. But, beyond a certain…

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Q: 0.0736t wheret is in days. A particular compound decays according to the equation y = ae Find the…

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Q: Radiocarbon dating techniques are used to determine that a very old piece of bone emits emits about…

A: Calculate the number of half lives which have been involved in the degradation. If n is the number…

Q: A sample of wooden artifact is found to undergo 8 HC disintegrations per minute per gram of carbon.…

A:

Q: Thoron has a high average annual radiation dose according to the graph. Iti eavy radioisotope formed…

A: No