A sample of 134La(T/2 = 6.5 min) has an activity of 4 curies. What was its activity one hour ago?
Q: sample 3.00 hours before the injection (at 7:00 am) with an activity of 3.53 μCi at the preparation…
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Q: What is the activity of a 20 ng sample of 92Kr, which has a half-life of 1.84 s?
A: In 92gm of 92Kr, will contain 6.02×1023 atoms of 92Kr.
Q: A sample has a ¹4C activity of 0.0052 Bq per gram of carbon. (a) Find the age of the sample,…
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Q: A pure carbon archaeological artefact has an age of 20000 years and an activity of 6 counts/min.…
A: The objective of the question is to find the activity of a pure carbon archaeological artefact at…
Q: A drug prepared for a patient is tagged with 4399Tc, which has a half-life of 6.05 h. The dose…
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Q: Calculate the activity of a pure 9.5-μgμg sample of 32 over 15P (T1/2=1.23×106s).
A: Mass of sample (m) = 9.5 ×10-6 grams Molecular mass of P-32 = 32 grams Half life (T1/2) = 1.23×106…
Q: radioactive
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Q: A 5,560 Ci 60 Co source used for cancer therapy is considered too weak to be useful when its…
A: Given, The activity of C60o used for cancer therapy = 5,560 Ci = R0 The reduced activity of C60o…
Q: A sample has a ¹4C activity of 0.0052 Bq per gram of carbon. (a) Find the age of the sample,…
A: The amount of carbon-14 in a living thing is constant. As a result of radioactive decays, carbon-14…
Q: . A saline solution of 24Na with an activity of 300 kBq is injected into the bloodstream of one…
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Q: a sample with a half-life of 19 days has an initial activity of 7.0 x 10^5 counts/s. what isits…
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Q: 2. Cs-137 source used in mining industry has an activity of 740 MBq as of March 30, 2000. What will…
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Q: radiation worker stands 50 cm away from a radioactive source of 25 mCi 57Co. Calculate the…
A: Given the activity of the radioactive source is equal to 25 mCi . The half- life of the source is…
Q: Question 6. At Canadian Light Source, a synthetie radioisotope is freshly prepared. The initial…
A: Given: The initial activity of synthetic radioisotopes is A0 = 10 mCi The activity changes after t =…
Q: A 5.0 x 105 Bq 241Am alpha source is used in a smoke alarm. The device is arranged so that 15% of…
A: (a) The alpha particles that detected by the device is I=15%R×q (1) Here, q is the Charge of an…
Q: Radioactive tracers are used to study ion transport across cell membranes. The beta-minus emitting…
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Q: Because of the 1986 explosion and fire in a reactor at theChernobyl nuclear power plant in northern…
A: Assume that the area is 1m2. Here, 1×1016Bq is spread uniformly over an area of 2.6×105km2, in 1m2…
Q: 40.12 A sample of material contains 2.00 x 1015 atoms. The sample initially consists entirely of a…
A: Let N denote the number of atoms of the radioactive substance A. Let t1/2 denote the half-life time…
Q: Find the activity of a sample containing 1.63 10-6 g of (60/27)Co (T1/2 = 5.27 years).
A: As we know that the number 1 mole of mass of C2760o = 60gm…
Q: Find the activity of a sample containing 4.72 x 10-6 g of 60/27Co (T1/2 = 5.27 years)
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Q: Find the activity A of a sample containing 4E-6 g of 2760Co (T1/2 = 5.27 years). (Use 59.93 u as the…
A: Given: Weight, W =4.0×10-6 g Mass number, A = 59.93 u Avogadro number, NA = 6.022×1023 atoms/mol…
Q: Use the worked example above to help you solve this problem. The half-life of the radioactive…
A: Given data:T1/2=1.6×103 yrN0=3.41×1016 nucleiFirstly, converting half life into…
Q: A radioisotope was injected in the human body. The half-life of the radioisotope is T/2 = %3D 6…
A: Given: T1/2=6 hours
Q: Calculate the activity due to 14C in 1.00 kg of carbon found in a living organism. Express the…
A: The formula of activity is,
Q: A synthetic radioisotope is freshly prepared in a lab that has an activity of 10.0 mCi. If the…
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Q: A lab worker reports an activity of 80,000 counts/scounts/s for a sample of magnesium-21, whose…
A: The objective of the question is to understand the reason behind the drastic decrease in the…
Q: What time interval elapses while 51.0% of the radioactivity of a sample of 7233As disappears, as…
A: As per given data, 51% of the radioactivity of a sample disappears.
Q: A 70kg patient is injected with 2.0 x 1013 atoms of Tc99m for a nuclear medicine imaging study.…
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Q: What is the mass of 60 Co in a cancer therapy transillumination unit containing 5.00 kCi of 60 Co ?
A: The expression for the mass,
Q: 131I is a Beta - emitter used as a tracer for radioimmunoassay in biological systems. (a) Write the…
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Q: A 228Th source is labeled 1.50 mCi, but its present activity is found to be 3.47 ✕ 106 Bq. (a)What…
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Q: A 7. A saline solution of 24Na with an activity of 300 kBq is injected into the bloodstream of one…
A: The objective of the question is to calculate the patient's blood volume using the given activity of…
Q: A small region of a cancer patient’s brain is exposed for 24.0 min to 475 Bq of radioactivity from…
A: Given: To find the dose in rads with the given values as,
Q: A sample contains 1.0 GBq of ⁹0 Sr and 0.62 GBq of ⁹0Y. (a) What will be the total activity of the…
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Q: Find the activity of a sample containing 8.53 1014 iodine-131 nuclei (T1/2 = 8.0 days).
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Q: Strontium-90 from the testing of nuclear bombs can still be found in the atmosphere. Each decay of…
A: The amount of nuclei initially absorbed is
Q: A wooden object found in an indian burial groud and subjected to radiocarbon dating. The decay rate…
A: Given: The final disintegrations N = 10 disintegrations per minute per gram carbon.
Q: (a) A wooden artifact is found in an ancient tomb. Its carbon-14 ( 14 c) activity is measured to be…
A: Known quantities:- Half life of carbon-14 (T1/2)= 5730 years Age of artifact is given by formula…
Q: The radionuclide 32P (T1/2 = 14.28 d) is often used as a tracer to follow the course of biochemical…
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Q: The C14 with an activity of 10 Ci is in a 1.0 mm thick lead box. Calculate the number of beta…
A: C14 has an activity of 10 Curie1 curie is defined as 3.7×1010 decays/sSo, 10×3.7×1010=37×101037×1010…
Q: A radioactive source emits 1800 α particles during an observation lasting 10 hours. In how many one…
A: This problem is based on probability, here the total number of events is 1800. The observation…
Q: 4. 500 mCi sample of radioisotope was purchased by a medical supply house. If the sample has the…
A: Given: The activity of the initial sample of the radioisotope is A0 = 500 mCi The activity reduced…
Q: A drug containing 9943Tc with an activity of 2.00 μCi is to be injected into a patient at 11:00 am.…
A: Given, At 11:00am, activity of is, A = 2μCi But initially, at 7:00am, activity of is, Ao = 3.16μCi…
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