Krypton-87 has  a rate constant of 1.5 * 10-4 s-1. What is the activity of a 2.00 mg sample?

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A: Given: 1) Mass of potassium in a typical banana is radioactive 0.0117% of the 600 mg of…

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Q: 235U + 92 on 140 Ва + 56

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Q: A sample of wood from an Egyptian mummy case has a specific activity of 9.41 d/min-g. How old is the…

A: Solution: We know that --- for a sample of wood from an Egyptian mummy which is related to…

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A: Radio active decay follows first order kinetics.

Q: If the amount of radioactive phosphorus-32 in a sample decreases from 2.4 mg to 0.30 mg in 42.9…

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Q: if the passing of five half -life leaves 50.0g of a of radioisotope sample, how much was present in…

A: Mass of sample after 5 half life = 50 g Initial amount = ?

Q: If the half-life of a parent material is 10 Ma, and about 88% (rounded) has decayed to daughter…

A:

Q: Krypton-87 has rate constant of 1.5 x 10 -4 / s. What is the activity of a 2.0 mg sample?

A: Welcome to bartleby ! Introduction : We have to calculate activity of sample

Q: A moisture density gauge uses à radioactive source containing the isotope Cs-137, which has a…

A: Cs-137 has a half-life of 30.17 years . Activity of the radioactive source is 8.00 mCi, when…

Q: Phosporous-32 half-life is 14.3 days. A vial containing 10ug of P-32 is accidentally spilled into a…

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Q: Samples recovered from an archaeological site are determined to have a 14C activity of 1.3 dpm/g.…

A: Given:   The activity of C-14 from recovered sample is 1.3 dpm/g. The activity of C-14 in living…

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Q: Predict the mode of decay of (a) plutonium-239, (b) indium-12o?

A: Pu-239 undergoes alpha decay and forms U-235. Alpha decay leads to decrease in atomic number by 2…

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Q: If the half-life of Xe-133 is 5.2 h, what will be the activity of the initially 20.-mCi sample after…

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Q: Nickel-63

A: Given, Half life = 92.0 yr Initial moles = 1.250  Time t = ?

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

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A: The question is based on concept of radioactive decay. we have to calculate the age of the wooden…

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: 5. A sample of wood from a Thracian chariot found in an excavation in Bulgaria has C-14 activity of…

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Q: I can't figure this out. Help?

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Q: 100 43 3. The half-life of TC, a B emitter, is 15.8 s. (a) How many atoms of 43TC are present in a…

A: An isotope exhibits radioactivity or emits radioactive particles, when the nucleus of the isotope is…

Q: 1. This question is about nuclear chemisty. a) What is the age of a mummy, given a 14C activity of…

A: (a) To find the age of mummy, Given that: Current 14C activity = 8.5 min-1 g-1 Activity just before…

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

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Q: The half-life of Palladium-100 is 4 days. After 24 days a sample of Palladium-100 has been reduced…

A: N  = N0 e-λt  N0  = Initial mass of the sample N = Mass of the sample after a time 't' λ = decay…

Q: A sample of a wooden artifact gives 5.0 disintegrations/min/g carbon. The half-life of C-14 is 5730…

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Q: A tiny piece of paper (produced from formerly living plant matter) taken from the Dead Sea Scrolls…

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Q: A radioactive source containing Y-90 has an initial activity of 20 µC a) How many decays per second…

A: The radioactive source containing Y-90 has an initial activity 20 μCi which equals…

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

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Q: If we start with L000 g of strontium-0, 0.953 g will remain after 2.00 yr. (a) What is the half-life…

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Q: Gold-198, a β-emitter used to test leukemia, has a half-life of 2.695 days. The standard dosage is…

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Q: The radioactive cobalt isotope, "Co, has an half-life of 63 months and undergoes decay. The m of Co…

A: From the data  A) We are calculating number of moles of cobalt after 5 years B) The activity of…

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: If a 40.00 mg of I-131 decays 20.00 mg in 10 days and in another it would decay to 10.0O0 mg, what…

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Q: The radioactive isotope 212Pb has a half-life of 10.64 h. A sample containing this isotope has an…

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

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Q: A mixed thorium decay product sample is separated into elements, yielding a 1.19mg sample of…

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Q: The half-life of a particular radioactive isotope X is 10.0 days. (1) Determine its decay constant.…

A: half life = 10.0 days.