A radioactive sample with a half-life of 9.4 s initially has 2,000,000 nuclei. What would be the activity, or decay rate, in Bq after 7.6 seconds?
Q: The activity of a freshly prepared radioactive sample with a half-life of 4 days is 1000 Bq. How…
A: Given : t1/2 = 4 days No = 1000 Bq N = 250 Bq
Q: Consider the nuclei Sn with an atomic number of 50 and mass number is 118 . Determine its mass…
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Q: The half-life of 131I is 8.04 days. c) Convert 0.550 ?Ci to the SI unit the becquerel. (d) Find…
A: c) one curie is 3.7 x 1010Bq converting 0.05 micro curie we get, 0.05 μCi = 0.05 x 10-6 x 3.7 x…
Q: How much is the mass of the sample in grams of Po-218 that has an activity of 5.00 x 1019 Bq? The…
A: Given Activity = rate of disintegration = 5 × 1019 Bq = 5 × 1019 disintegration/second Half life =…
Q: How many half-lives would it take for 6.02×10 ^23 nuclei to decay to 6.25%(0.376×10^23) of the…
A: Initial no. Of nuclei( No) =6.02×1023 Final no. Of nuclei(N)=0.376×1023 ;(6.25% of initial no. Of…
Q: A radioactive sample with a half-life of 3.1 s initially has 10,000,000 nuclei. What would be the…
A: The activity is R=11955.3677Bq
Q: The mass defect of nuclei (213X ) is 1.686 amu. Estimate the total binding energy per nucleon in…
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Q: A radioactive sample has an initial activity of 6.55 x 10°Bq (1Bq is one disintegration per second).…
A: Given, initial activity N0 = 6.55 x 109 Bq After t=4 hours, activity N = 1.02 x 108 Bq Half life…
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: A student carries out a radioactive decay experiment. She measures the activity of a source as a…
A: Dear student Activity is defined as rate of radioactive decay of nuclei. It is denoted by R = ¥ N…
Q: Radium-226, 226Ra, undergoes an alpha decay. The current sample of Radium-226 has an initial…
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Q: 4⁰K is an unusual isotope, in that it decays by negative beta emission, positive beta emission, and…
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Q: For a fission reaction, 1.92 x 1016 J of energy is released. What is the mass defect in kg?
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Q: Plutonium has a decay constant of 2.75 × 10-16 s-1. Activity of 1 g of sample will be 0.678x106 Bq.…
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Q: purchased by a medical supply house. If the sample has a half-life of 14 d, how long will it keep…
A: Just replace the values .... An its done
Q: Chromium's radioactive isotope 5'Cr has a half-life of 27.7 days and is often used in nuclear…
A: from the given information,
Q: A radioactive sample of 60Co (t₁/2 = 5.271 y) has a ß- activity of 4.4 X 107 Bq. How many grams of…
A: When the number of protons and neutrons inside a nucleus is not balanced some nuclei will become…
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: The mass defect of nuclei (177X ) is 1.733 amu. Estimate the total binding energy per nucleon in…
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Q: a sample containing l-131 has an activity of 6.4x10^8 Bq.h how many days later will the sample have…
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Q: A tree falls in a forest. How many years must pass before the C activity in 1.00 g of the tree's…
A: mass = 1 g number of atoms = number of moles * avogadro number = (1/14)(6.022 * 1023) = 4.3 * 1022…
Q: 4⁰K is an unusual isotope, in that it decays by negative beta emission, positive beta emission, and…
A: Q value for a reaction is the amount of energy absorbed or released during the nuclear reaction. The…
Q: A piece of radium has an activity of 92 mCi. (a) What is the mass of the radium?
A: Given: The activity of the radium is 92 mCi. The molecular mass of the radium is 226.
Q: A sample of radioisotope has a decay constant of 9.976✕10-7 s-1 and prepared with an initial…
A: Given data: The decay constant of a sample of a radioisotope is, The initial activity of a sample…
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: A sample of carbon of mass 6.74 g taken from an animal jawbone has an activity of 4.00 decays/min.…
A: Given that the 6.74 g of carbon taken from the jawbone. The no. of moles in 6.74 g of carbon be…
Q: In a piece of rock from the Moon, the Rb content is assayed to be 1.89×1010 atoms per gram of…
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Q: 40K is an unusual isotope, in that it decays by negative beta emission, positive beta emission, and…
A: As per the mass-energy equivalence principle, energy and mass are interconvertible. Thus when energy…
Q: he half-life of 27Mg is 9.50 min. Initially there were 3.70 × 1012 27Mg nuclei present. How many…
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Q: A. B. Use the worked example above to help you solve this problem. The half-life of the radioactive…
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Q: A nuclei has a half-life of 2.80 days. If 122 mCi were prepared but had a delay of 8.0 days. How…
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Q: A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 0.92-kg…
A: The initial activity of the sample can be obtained as R0=0.92×103 g15.0 decays/min11g=1.38×104/min
Q: The half-life of 60?? is 5.27 years. The activity of a 60?? is 3.50 × 109 Bq. What is the mass of…
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Q: The half-life of 43100Tc, a ß- emitter, is 15.8 s. a). How many atoms of 43100Tc are present in a…
A: Half life of decay = 15.8 Activity of sample = 0.2×10-6 = 3.7×1010 ×0.2×10-6 = 7400Bq
Q: The half-life of 27Mg is 9.50 min. initially there were 3.70× 1012 27Mg nuclei present. How many…
A: Given: The half-life of 27Mg t1/2 = 9.50 min At t=0, the number of nuclei of 27Mg, N0 = 3.70× 1012…
Q: 0.1 mg of pure 23ºPu (emitting Alpha particles) was found to decay with an activity of 1.38 x 107…
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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: Many medical PET scans use the isotope 18F, which has a half-life of 1.8hr . A sample prepared at…
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Q: In many cases, prostate cancer is treated by implanting 60 to 100 small seeds of radioactive…
A: Given data: The half-life of palladium is t1/2=17 days. The mass contained by the grain is m=0.27…
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