A bone has a carbon-14 decay rate of 4.85 disintegrations per minute per gram of carbon. If a living organism has a decay rate of 15.3 disintegrations per minute per gram of carbon, how old is the bone? The half-life of carbon-14 is 5715 years. Give your answer as X 104 years

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):

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A:

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

A:

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: Answer  4460 years

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

Q: NUCLEAR REACTIONS Zinc-62 decays with a half-life of 9.186 hours. 1. Write the balanced nuclear…

A: Answer: All nuclear reactions are first order reaction therefore integrated rate law of first order…

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A:

Q: An unknown radioisotope exhibits 8540 decays per second.After 350.0 min, the number of decays…

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Q: The half life of a certain substance is 5.6 days. How long will it take for 100 g of the substance…

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Q: A sample of sodium thiosulfate, Na2S2O3, contains sulfur-35. Determine the mass of in the sample…

A: Given, Half life of sodium thiosulfate = 88 days

Q: If 28.0% of a sample of sodium-24 decays in 7.11 hours, what is the half-life of this isotope (in…

A: Given data,  Let, Initial amount of sample is [A]o=100% 28 % of sample is decay so remaining amount…

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

A: The radioactive decay always follows the first order kinetics. The radioactive decay of I-125 must…

Q: The isotope 32P emits radiation and has a half-life of 14.3 days. Calculate the decay constant in…

A:

Q: In a sample of a radioactive isotope, 20.0 % has decayed after 30.0 days. Calculate the half-life of…

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

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: In medical application prior to having an MRI, a patient will be administered a dye containing a…

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

A:

Q: Phosphorus-32 is a commonly used radioactive nuclide in biochemical research, particularly in…

A: Answer: Given data: t1/2=14.3dayst=33.0days Mass of sample m=188mg

Q: Strontium-90, a beta emitter, has a half-life of 28.1 yr. If 29.1 mg of 90Sr were incorporated into…

A:

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 a radioactive nucleus is 1.5·10 -8 s. What is this half-life in milliseconds (ms),…

A: The half-life of the given radioactive nucleus is 1.5×10-8 s. This half-life can be converted into…

Q: Imagine you collected a volcanic rock while on vacation to Hawaii and you want to know how old it…

A: GIVEN: Amount of parent nuclei (U-234) = 4 micrograms Amount of daughter nuclei (Th- 230) = 124…

Q: 1.Write the nuclear equation for the radioactive decay of radium-226 by alpha decay.

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

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: Phosphorus-32 is a radioisotope used to detect certain types of tumors. P-32 has an effective…

A: Phosphorus-32 is a radioisotope used to detect certain types of tumours. P-32 has an effective…

Q: Cobalt-60 is a strong gamma emitter that has a half-life of 5.26 yr. The cobalt-60 in a radiotherapy…

A: There are some unstable nuclei which undergo radioactive decay by emission oc charged particles.…

Q: a radioactive isotope. Z-109 has a half life off 43.1 years. how manny years Will it take the sample…

A:

Q: approximately 25,000 years. How many undecayed nuclei remain after 100,000 years? b) calculate the…

A: We will use first order kinetics formula

Q: Calculate the half-life of an isotope if 155.2 mg disintegrates to 19.40 mg in 12.9 min.

A: Given    Initial Amount [ A ]0         = 155.2 mg    Remaining amount [ A ]t  = 19.40 mg   Time ( t…

Q: mass of phosphorus-32,

A:

Q: If a tree dies and the trunk remains undisturbed for 1.620 x 104 what percentage of the original 1*C…

A:

Q: The half-life of radium-226 is 1.8x103 years. How many hours will it take for a 2.50-gram sample to…

A: Interpretation-  To determine how many hours will it take for a 2.50-gram sample to decay to the…

Q: If 28.0% of a sample of copper-64 decays in 6.16 hours, what is the half-life of this isotope (in…

A: We will use formula of rate constant first order kinetics

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

A: (half-life of potassium-40 is 1.25 x 10° yr) is wrong it should be 109 (half-life of potassium-40 is…

Q: The isotope 32P emits radiation and has a half-life of 14.3 days. Calculate the decay constant in…

A: Solution -

Q: The technique known as potassiumargon dating is used to date volcanicrock and ash, and thus…

A:

Q: A sample of bone is subjected to radiocarbon dating. The current decay rate observed for its…

A:

Q: 3. Thorium-232 has a radioactive decay series that ultimately produces lead-208. What is the…

A:

Q: Phosphorus-32 is a commonly used radioactive nuclide in biochemical research, particularly in…

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Q: A radioactive sample has a decay constant of 1.32 x 10-3 h-1. What is its half life?

A: Radioactivity is a first order kinetics. Relation for decay constant ( λ) and t1/2 relation for…

Q: A bone has a carbon-14 decay rate of 4.98 disintegrations per minute per gram of carbon. If a living…

A: Solution : N0= 4.98 dpm N(t) = 15.3 dpm  t1/2 = 5715 years  t = ?

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 =…

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.