A sample of a wooden artifact gives 5.0 disintegrations/min/g carbon. The half-life of C-14 is 5730 years, and the activity of C-14 in wood just cut down from a tree is 15.3 disintegrations/min/g carbon. How old is the wooden artifact?

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: Cesium-137 is part of the nuclear waste produced by uranium-235 fission. The half-life of cesium-137…

A:

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

A:

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

A:

Q: Fluorine-18, which has a physical half-life of 110 min, is used in PET scans. if 1.00g of…

A: The fluorine-18 sample was shipped at 5:00 PM and arrives the laboratory at 9:30 AM in the next…

Q: a) If an object that was once living died 35,500 years ago, what is the exact percentage of the 14C…

A: a. The half life equation for decay is shown below: Where; Cfinal represents final concentration…

Q: A patient undergoing thyroid radiotracing was initially administered with 50.0 mg of iodine-131.…

A:

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: a rock conatains 0.257mg of Pb-206 for every milligram of U-238. The half-life for the decay of…

A:

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: Approximately how many half-lives must pass for the amount of radioactivity in a substance to…

A: Given, radioactivity of the substance decreases below 1% of its initial level.The initial percentage…

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

A: Half-life of Fe-59 = 44.5 days To calculate - Time required for the Fe-59 sample to fall to 9.36 %…

Q: What is the half‑life of an isotope that decays to 6.25%6.25% of its original activity in 24.2…

A: The half-life  is the time it takes for the concentration of that substance to fall to half of its…

Q: A

A:

Q: Plutonium-239 is the fissionable isotope produced in breeder reactors; it is also produced in…

A:

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

A: The first-order rate law can be transformed into another highly useful equation with the decay…

Q: Iodine-131 is administered orally in the form of Nal(aq) as a treatment for thyroid cancer. The…

A: Answer: Suppose initial quantity of Iodine-131 is N0  Then remaining after time t will 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. What is the half-life of…

A: Given, t = 190 days t1/2 = ?

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 the half-life of uranium-234 if 4.49×10° years are required for the activity of a sample of…

A:

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: Some mammoth bones found in Arizona were found by carbon-14 dating to be 1.13x104 years old. What…

A: Given: Original activity = 15.3 disintegrations per minute per gram. Age of bones = 1.13 × 104…

Q: Iodine-131 is administered orally in the form of Nal(aq) as a treatment for thyroid cancer. The…

A: We know, radioactivity is an example of first-order reaction.

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: A radioactive isotope decays from 60 grams to 15 grams in 20 seconds. What is its half-life? a) 20…

A: The radioactive decay is an example of first order reaction.

Q: What is the half-life of iron-55 if 5.93 years are required for the activity of a sample of iron-55…

A:

Q: A piece of parchment believed to be the original Magna Carta (signed at Runnymede in 1215 A.D.) is…

A: Here we have to determine the activity in dpm of a dead piece of parchment which is live 80 years…

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

A:

Q: An archaeologist claims that a bone in her collection is from a saber-tooth tiger that is believed…

A:

Q: After 19 days have elapsed, 1/21 of a radioisotope sample remains undecayed. What is the half-life…

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: If a rock sample was found to contain 1.27 x 10-7 mol of argon-40, how much potassium-40 would also…

A:

Q: If a tree dies and the trunk remains undisturbed for 1.170 × 10' years, what percentage of the…

A: This is a first order reaction. t½ = 0.693 ÷ k 5730 = 0.693 ÷ k k = 1.21 × 10-4  year-1 where k is…

Q: One of the nuclides in spent nuclear fuel is U-235, an alpha emitter with a half-life of 703 million…

A: Using the given half-life period, rate constant, k can be determined.

Q: (c ) Iodine-131 has a half-life of 8 days. How many grams of I-131 in a 4.0 g sample remain after…

A: (c) The amount of the isotope that remains after given decay time is calculates by using below…

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

A: Given: Half-life of carbon-14 decay = 5730 years. Activity of carbon-14 in the sample = 90 Bq. And…

Q: A substance X initially weights 56 grams. After 6 minutes, it was observed that its mass decreased…

A: Mass at starting (t=0) = 56 grams Mass after 6 min = (56-12) g                                = 44 g…

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: One of the radioactive isotopes used in medical treatment or analysis is iodine-125. The half-life…

A: radio active decay are first order                       Rate constant =0.693/half life…

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

A: Given data:

Q: Iodine-131 is administered orally in the form of Nal(aq) as a treatment for thyroid cancer. The…

A:

Q: The accompanying figure illustrates that after two half-lives, ____ percent of the parent…

A: It is given a graph of half-life at x-axis and parent isotope remaining in percentage at the y-axis,

Q: 7. The half-life of C-14 is 5730 years. The measurement of the percentage of the C-14 remained in a…

A: Given : Half life of C-14 = 5730 years A = 10.8 And A0 = 100

Q: What is the approximate age of the artifact?

A:

Q: What is the half-life of magnesium-20 if 1.24 seconds are required for the activity of a sample of…

A: