Find the half-life of a material that has a decay constant of 2.20 x 10-8 s-1.
Q: Question 4. A synthetic radioisotope is freshly prepared in a lab that has an ac- ivity of 10.0 mCi.…
A: Given data as per question t = 5.00 h A0 = 10.0mCi
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Q: Material found with the body had a C-14 activity of about 0.215 Bq per gram of carbon, where the A0…
A: The half life is t1/2=5730 yrs
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A: T1/2 = 1620 years = 1620 x 3.15 x 107s λ = 0.693/ T1/2 = 0.693/(1620 x 3.15 x 107 s)
Q: 3. An ancient club is found that contains 150 g of pure carbon and has an activity of 5.5 decays per…
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Q: A certain sample has 6.4 x 10^7 particles and a half life of 3.5s. Compute the a) decay constant…
A: initial sample, No = 6.4 x 107 Half life, T = 3.5 s
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Q: A certain isotope has a half-life of 6.4 h and an atomic mass of 87.29 u. What will the activity in…
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Q: When Po decays, the product is Pb. The half-life of this decay process is 1.78 ms. If the initial…
A: Determine the decay constant as follows. λ=0.693t12=0.6931.78 ms=0.6931.78×10-3 s=389.3258 s-1
Q: The decay constant of a radioactive source is 752 per year. Then its half- life equals: *
A: Step:1 The Time taken for a radioactive atom to disintegrate to half of its original…
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A: The rate at which this decay takes place in a given sample of radioactive material is called its…
Q: A radioactive sample has a decay constant of 2.97 x 10 s¹¹. Estimate the half-life.
A: Unstable nuclei decay into a stable state. This process is called radioactivity. The rate at which…
Q: a) The half-life of iodine-125 is 59.4 days. If the initial mass of iodine-125 is 128 µg, what mass…
A: a) Given, the half-life of iodine-125 is T12=59.4days the initial mass of iodine is…
Q: 198Au has a decay constant of 2.97 x 10-6 s-1. Activity of 1 g of the sample will be 9.03×1015 Bq.…
A: Unstable nuclei become stable by radiating energy. This process is called radioactivity. The rate at…
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Q: The activity of a sample of a radioisotope at some time is 10.5 mCi and 0.46 h later it is 7.00 mCi.…
A: Initial activity of isotope is Ro = 10.5 mCi Activity after some time is R = 7.00 mCi Time elapsed…
Q: What is the half-life of an isotope that decays to 6.25% of its original activity in 60.2 h?
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Q: U235 has a decay constant of 3.138 × 10-17 s-1. Activity of 1 ug of the sample will be 80.386×10-3…
A: Unstable nuclei become stable by radiating energy. This process is called radioactivity. The rate at…
Q: Protactinium has a half life of 3.28 x 104 years. Estimate the decay constant.
A: Most of the heavy nuclei will undergo decay to become stable by reducing the number of neutrons or…
Q: There is more than one isotope of natural uranium. If a researcher isolates 1.00 mg of the…
A: mass = 1 mg = 0.001 g Activity = 80Bqhalf life ??
Q: A radioisotope has a half-life of 5.00min and an initial decay rate of 8000 Bq. (1.) What will be…
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Q: A sample of radioactive material is studied in a lab and is found to have a decay constant of 100 ×…
A: When an atomic nucleus becomes unstable they become stable by radiating energy this process is known…
Q: You measure the decay rate of a radioactive sample to be 4.225 x 101 Bq. After 139 seconds, the…
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Q: Potassium-argon dating is used to measure the age of rocks formed from cooled lava by determining…
A: The radioactive dating of rocks formed from cooled lava is determined by using parallel decay of…
Q: An ancient club is found that contains 140 g of pure carbon and has an activity of 4 decays per…
A: Given Mass of carbon in ancient club = 140 gm Carbon activity = 4 decays /sec Living trees ratio of…
Q: (a) Natural potassium contains 40K , which has a halflife of 1.277 X 09 y. What mass of 40K in a…
A: Half-life of k-40 1.277 X 09 y Decay rate of 4140 Bq a) Number of k-40 nuclei…
Q: An ancient rock is obtained from an excavation inside a mine. It is found that the ratio of the…
A: The formula of the radioactivity is N = No e-λ t where, N is the left over atoms, No is the…
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Q: A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 1.19 kg…
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Q: Potassium-argon dating is used to measure the age of rocks formed from cooled lava by determining…
A: Potassium-argon dating is an interesting way to measure the age of rocks formed from cooled lava. It…
Q: a) What is the decay constant of fluorine-17 if its half-life is known to be 66.0 s? λ = b) How…
A: Given value--- Half life time of F -17 (t 1/2) = 66 sec. We have to find--- What is the decay…
Q: If it is known that 87% of an initial radioactive sample remains after 3 days, what is the decay…
A: Given: The amount of radioactive decay is 87% of the initial amount. The time is 3 days.
Q: Question 1. Tritium has a a tritium sample will remain (a) after 5.00 yr?
A: GivenHalf Life for Tritium, t1/2=12.33 years
Q: A certain isotope has a half-life of 5.9 h and an atomic mass of 95.98 u. What will the activity in…
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Q: Potassium-argon dating is used to measure the age of rocks formed from cooled lava by determining…
A: Disclaimer: This is a multiple-part question. Since it is not given which part to be solved, we will…
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