A fossil contain 23% of the carbon-14 that the organism contained when it was alive. Graphically estimate its age. Use 5700 years for the half life of carbon-14 *. The fossil is approximately..... years old (round to the nearest integer as needed)

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

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Q: The amount of radio active material present at time t is given by A=Aoekt, where Ao is the initial…

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Q: Suppose the amount of a certain radioactive substance in a sample decays from 4.60 mg to 1.90 mg…

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Q: U-238 decays with the half-life of 4.47 billion years. Calculate the % of a sample left after 13.4B…

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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 certain radioactive substance decays at a rate proportional to the amount present. If a quarter of…

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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: what percentage of the strontium-90 that was made 1945 still exsist now in the year 2021? the…

A: Given , Strontium -90  half life t1/2=28.9 initial concentration (concentration in 1945) = CA0 final…

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: Answer  4460 years

A: Expression for half-life period of radioactive element is given as,

Q: Radioactive Decay The half-life of palladium-100 is 4 days. After 20 days a sample has been reduced…

A: Given Data:  Half life of Pd-100 = 4 days  Reduced mass = 0.375g The formula of half life is given…

Q: Uranium-240 has a half-life of 14.1 hours (note this is NOT a fissionable isotope).  A country with…

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Q: A piece of literature has announced that Uranium 238( 23822U) has a binding energy of approximately…

A: We can theoretically calculate the mass of a neutron. But this will be different from the…

Q: After 52 hours of decay, only 0.06m of Cu-64 remains from the original sample of 1g. What is the…

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Q: Since the radioactivity of 233UF6 with a mass of 0.420 g is 9.88 * 104 Bq, find the half-life for…

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Q: The half-life of a radioactive isotope is 13 seconds. How long does it take for 100 mg of the…

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Q: A wooden artifact from a Chinese temple has a 14C activityof 38.0 counts per minute as compared with…

A: Given, The activity of carbon of the wooden artifact from a chinese temple is Nt = 38.0 counts per…

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: The half-life of Polonium-218 is 3.00 minutes.  How many half-lives pass after 18.0 minutes ?  The…

A: Concept - Radioactive decays are first order reactions. So we use the formula, Nt = No(1/2)n, where…

Q: A sample of radium has a weight of 1.5 mg and a half-life of approximately 6 years. Find a…

A: Recall the expression to calculate remaing amount Remaining amount=initial amount2nHere n is number…

Q: A wooden statue found in Egypt has a carbon-14 content that is three-fifths of that found in living…

A: Given: A wooden statue found in Egypt has a carbon-14 content that is three-fifths of that found in…

Q: A certain artifact is tested by carbon dating and found to contain 73% of its original carbon-14. As…

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Q: If 7.0 grams of a sample decays to 0.44 grams in 2.0 hours, what is the half-life time of the…

A: For calculation of half life first of all we need rate constant of the reaction, which can be…

Q: A sample of Uranium-234 has been decomposing. If the original mass of 234U is 2.57milligrams, how…

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Q: Determine the half-life of the substance that decays from A, to A in time t. A, = 43, A = 19, t= 16…

A: Formula used  A = Ao [1/2]t/t1/2  where A = initial conc , Ao = final conc  t = time , t1/2 = half…

Q: An old wooden bowl unearthed in an archeological dig is found to have one‑fourth of the amount of…

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Q: A wooden object from a prehistoric site has a carbon-14 activity of 10 counts per minute (CPM)…

A: Given: Half-life = 5730 years [A]=10 cpm [A]0 = 40 cpm

Q: c) What percentage of the isotope will remain after 115 days lfur 25. alpha beta and

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

A: Plot is,

Q: A fossil gives 435 disintegrations per g of carbon during 1 h of counting. The age of the fossil…

A: Radioactive decay: Radioactive decay or nuclear disintegration is a process in which an atom with…

Q: if 8.000 grams of U-234 are sealed in a container and then opened many years later -- how much time…

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Q: In 1947 samples of the Dead Sea Scrolls were analyzed by carbon dating. It was found that the…

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Q: The half-life of carbon-14 is 5,730 years. Write the exponential decay function and find k. If the…

A: Half life:It is represented by the symbol t1/2. It was discovered by Rutherford. It is defined as…

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

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Q: Suppose the amount of a certain radioactive substance in a sample decays from 7.40 mg to 4.60 mg…

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Q: 20. At the time an item was produced, 0.01 of the carbon it contained was carbon-14, a radioisotope…

A: Solution

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Q: A sample of 113m In has a half life of 100 minutes. What amount of 113m In remains (in CPM) if a…

A: An exponential decay can be described by the formula:

Q: The half-life of carbon-14 is approximately 5730 years. At an archacological dig a fossil is…

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

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Q: After 4.00 years a 2.0 g sample of a radioisotope remains from a sample that had an original mass of…

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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 10.00-g plant fossil from an archaeological site is found to have a 14C activity of 3094…

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

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Q: A wooden artifact from an ancient tomb contains 30 percent of the carbon -14 that is present in…

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Q: What is the approximate age of the artifact?

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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.