Carbon-14 has a half-life of 5730 yr. A living organism has an activity of 15.2 counts per minute (cpm) per gram of carbon. If a bone is determined to have an activity of 10 cpm per gram of carbon, how old is the bone in the unit of years? Please report an integer.

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: Uranium is radioactive and decays into lead.  This process can be used to date rocks.  A piece of…

A: This problem is based on nuclear chemistry. We know radioactive decay follows first order chemical…

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

A:

Q: A 116.8 ng sample of an unknown radioactive substance was placed in storage and its mass measured…

A: Given- Initial amount=116.8ng Final amount=14.60ng Time=47days

Q: You have a sample of unknown medication that is radioactive. You believe you should be able to…

A: Given: The initial activity, (A0) = 1.14×106 Bq. The activity after 11.1 hrs, (A) =  6.60×105 Bq.…

Q: If a rock contained 12.0 g of ⁴⁰K when the earth was formed 4.54 billion years ago and the half-life…

A: Given information is as follows; Initial mass of ⁴⁰K in the rock A0 = 12.0 g Final mass of ⁴⁰K in…

Q: Moonrock collected by a US Apollo mission is estimated to be 4.30 billion years old by uranium/ lead…

A:

Q: A patient is given 0.500 ug of technetium -99m, a radioactive isotope with a half-life of 6 hours.…

A:

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 3.70 billion years old by…

A: Since this is a first order decay The rate constant with half life is given by…

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

A:

Q: In a dusty corner of a spooky abandoned lab, you find a vial labeled “70g of iron-55”.  You weigh…

A: Welcome to bartleby !  We have to calculate time required

Q: A radioactive isotope has a half-life of 11 minutes.  How many grams of a 18.68 g sample remain…

A: Given Half life = 11minutes = 11*60= 660 second Sample weight = 18.68g Time = 44 minutes = 44*60=…

Q: A radioactive sample decays with a half-life of 71.19 minutes. If the original activity of the…

A:

Q: The activity of radioactive carbon-14 decay in a piece of charcoal found at a volcanic site is 11.0…

A: Step 1. Determine decimal fraction of Carbon -14 remaining: 11.018.3=0.601   Step 2. Determine how…

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 small figure carved from wood, believed to predate the period of Roman occupation of the Middle…

A:

Q: Enter your answer in the provided box. A rock sample originally contains 3.32 mg of 43°U. How much…

A:

Q: Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the 14C has decayed to…

A: Given,                 Isotope = 14C                 Half life =5730 years                 Remaining…

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

A:

Q: Suppose the activity due to the radioactive decay of the carbon-14 in a tiny sample of an artifact…

A: Half life for decay of C-14 (t1/2) = 5.73 × 103 years  Activity due to decay in archaeological…

Q: Carbon-14 has a half-life of 5730 years and the radiocarbon activity of wood recently cut down is…

A:

Q: Nickel-63 undergoes beta decay to form copper-63. At time = 0, a closed vial contains 55.3 grams of…

A: The radioactive decay follows first order kinetics.The integrated rate law for the first order…

Q: A 26.00-g sample of water containing tritium, 31H, emits1.50 x 103 beta particles per second.…

A: In radioactive decay, radioactive atom's nuclei (unstable) eject energy as well as charged particles…

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 3.50 billion years old by…

A: Given , Age of sample collected from moon t= 3.5 billion year =3.5×109 year

Q: Carbon-14 has a half-life of 5730 yr. A living organism has an activity of 15.2 counts per minute…

A:

Q: Using activity to radiodate The half life for the decay of carbon-14 is 5.73 x 10 years. Suppose the…

A: The problem is asking us to find the age of an artifact using the concept of radioactive decay. The…

Q: The half life for the decay of carbon-14 is 5.73 x 1 × 10³ years. Suppose the activity due to the…

A:

Q: While in the upper peninsula, you have found an unusual fossil in a rock layer that you are really…

A:

Q: Can the half-life of a given isotope be manipulated or changed to suit human needs?

A: Answer

Q: A normal adult jawbone contains 200 mg of Carbon-14 in a living person. If scientists found a…

A:

Q: QUESTION 7 A radioactive isotope, Z-109, has a half-life of 62.3 years. How many years (y) will it…

A: First of all by using half life period, we can calculate the the rate constant k and then by using…

Q: 4. You find a skull in a nearby Native American ancient burial site and with the help of a…

A:

Q: Californium-244 has a half-life of 19.4 minutes. If a researcher has 3.50 mg of Californium-244, how…

A:

Q: A bottle of wine, which was analyzed for its tritium (3H) content, was found to contain 12.30% of…

A: Given: The half-life of tritium (t1/2) = 12.3 years  Amount left of tritium = 12.3 ℅

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: Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the 14C has decayed to…

A: For each half life, the specimen decays half the amount of initial amount.

Q: A wooden object from an archeological site is subjected to radiocarbon dating. The activity due to…

A: To determine the age of the archaeological sample, we can use the formula for radioactive decay:

Q: Carbon-14 has a half-life of 5730 yr. A living organism has an activity of 15.2 counts per minute…

A:

Q: The half life for the decay of carbon-14 is 5.73 x 10³ years. Suppose the activity due to the…

A: Given: The half-life of carbon-14 = 5.73 × 103 years The activity of the sample = 81 Bq The activity…

Q: Carbon-14 has a half-life of 5730 yr. A living organism has an activity of 15.2 counts per minute…

A:

Q: A sample from an archeological artifact contained 7.97 x 10-11 g of C-14. A similar sample from a…

A: The objective of the question is to determine the number of half-lives that have passed and the age…

Q: A radioactive isotope emits 999 disintegrations per minute due to beta decay. If after 1.01 years…

A: Since the relationship between activity and time is given by  A0 e-λt = A where A = activity after t…

Q: Explain what is meant by the half-life of a radioactive nuclide. Living wood has an activity of 16…

A: A radioactive nuclide is an atom that has excess nuclear energy, making the atom unstable.…

Q: 2. A wooden object from an archeological site is subjected to radiocarbon dating. The activity of…

A: