The half-life of carbon-14 is approximately 5730 years. At an archacological dig a fossil is discovered to have 36.25% of its carbon-14 remaining. Approximately how old is the fossil?

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

A: Calculate the value of rate constant (k):

Q: The carbon-14 activity of some ancient Peruvian corn was found to be 10 disintegrations per minute…

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Q: Iron-59 is commonly used as a source of B particles. How long does it take for 87.5% of a sample of…

A: Radio active decay is an example of 1st order reaction. and for 1st order reaction the rate law is…

Q: While harder to access, another radioactive isotope of technetium, Tc-93, has a half-life of 2.73…

A: Solution Tc ninety nine m is wide used for diagnostic and therapeutic functions. It emits gamma…

Q: Suppose the amount of a certain radioactive substance in a sample decays from 8.50 mg to 3.80 mg…

A: Given Initial concentration of radioactive substance =          8.50mg Final concentration of…

Q: What is the original mass of C-14 in a sample if 10.00 mg of it remains after 20,000 years? The…

A: The C-14 decays according to first order kinetics. Since we know that the relationship between the…

Q: A substance has a half-life of 2.045 minutes. If the  initial amount of the substance was 132.8…

A: Given,  Half-life, t1/2  = 2.045 minutes Initial ammount, A0 = 132.8 gram

Q: A shell fossil that originally contained 100 mg of carbon-14 non contains 75 mg of the isotope.…

A: Initial amount, [A]0 = 100 mg  Final amount, [A] = 75 mg  Half-life, t1/2 = 5570 years

Q: 9. A wood artifact is known to have decayed and only 55% of the original artifact remains. The age…

A: Since, you have asked multiple questions, we will solve the first question for you.  In Question-9…

Q: 6. A rock contains 0.257 mg of lead-206 for every milligram of uranium-238. The half-life for the…

A: Given, Half-life - 4.5 × 109 yr. 1 mg U-238 contains 0.257 mg of Pb-206.

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: 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: The half life for the decay of carbon-14 is 5.73 × 10 years. Suppose the activity due to the…

A: Given that : Half-life of carbon-14 = 5.73 x 103 years The activity due to the radioactive decay =…

Q: Iron-59 is a radioisotope that is used to evaluate bone marrow function. The half-life of iron-59 is…

A: Detail mathematical calculation is shown below

Q: 24 Am is used in many home smoke alarms. It has a decay half-life of 457 years. How long does it…

A: All radioactive decay follows first order kinetics. So in order to solve for the time required we…

Q: What is C-14 activity in a sample that is 2.0 x 104 yr old? Assume that C-14 activity in the living…

A:

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

A:

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

A: Radioactivity is the phenomenon in which an unstable nucleus loses energy.

Q: Iron-59 is a radioisotope that is used to evaluate bone marrow function. The half-life of iron-59 is…

A:

Q: 20. lodine - 125 emits gamma rays when it decays to Tellerium-125 and has a half-life of 60 days. If…

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Q: If a rock sample was found to contain 4.65 x 10 mol of argon-40, how much potassium-40 would also…

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Q: 14C decays to 12C with a half-life of about 5,700 years. Suppose you find a fossil in which the…

A: Radioactive decay follows the first-order kinetics. The half-life of the first-order reaction does…

Q: lodine - 125 emits gamma rays when it decays to Tellerium-125 and has a half-life of 60 days. If a…

A:

Q: 22. A normal adult jawbone contains 200 mg of Carbon-14 in a living person. If scientists found a…

A: Given initial Concentration of C-14         = 200 mg Remaining Concentration of C-14 = 50  mg  Half…

Q: Calculate the age of a fossil that had 100 g of C-14 and now it has 12.5 g of C-14. The half-life of…

A: Use first order kinetic formula to get answer. Half life is given in years so we can use first order…

Q: The half-life of C-14 is 5730 years. How many grams of carbon-14 will remain after 17190 years, if…

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Q: At a given time, there are 1.2 mg of a radioactive substance present. After 6 hours there is only…

A: To solve this question, first find out the rate constant of radioactive substance and using that…

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

A:

Q: The half life of the radioactive element ubtonium-31 is 10 seconds. If 80 grams of unobtanium-31 are…

A:

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

A: Decay of C-14 follow 1st order kinetics λ (decay constant) = 0.693/t1/2 = 0.693 / 5730 years = 1.21…

Q: The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced…

A: The initial mass of the sample of palladium-100, No, in mg is calculated as shown below where t1/2…

Q: The half-life of 14C is 5,730 yr. Assuming some charcoal from a campfire 29,000 years old was found,…

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Q: A certain substance is known to decay at a rate proportional to the present amount. Initially, there…

A: Radioactive decay is the first order reaction.The half life time for a radioactivedecay is given by…

Q: Carbon-14 dating is used to find the age of ancient objects. The half-life of Carbon-14 is 5730…

A: Given : Half life of Carbon-14 = 5730 years  And the piece of clay pot has undergone 1.5 half lives.…

Q: an artifiact has a carbon-14 concentration that is 12.5%(1/8th) of that found in living organisms.…

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Q: Na-24 is used in medicine to study the circulatory system. If one gram of Na-24 decomposes by beta…

A:

Q: Carbon-14 has a half-life of 5730 yearsyears. In a plant fossil, you find that the 14C14C has…

A: Given data:

Q: A rock contains 0.257 mg of lead-206 for every milligram of uranium-238. The half-life for the decay…

A:

Q: The half life of radium-226, the first radioactive element discovered, is 1,620 years. If a sample…

A: Radioactive reactions are of first order. The relationship between half life t1/2 and rate constant…

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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Q: The half-life of carbon-14 is about 5730 years. If an ancient leather strap is about 11,500 years…

A:

Q: A volcanic eruption melts a large chunk of rock, and all gases are expelled. After cooling, argon-40…

A: Half-life of potassium-40 = 1.25 x 109 year A = The final amount of 40 K left = 1.38 mmol  A0 =…

Q: what is it's half-life?

A: