A certain radio'sotope has a half-life of 11.7 days. What percentage of an initial sample of this isotope remains after 22 days?
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Q: The half life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
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Q: The half life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
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Q: The half-life of 131I is 8.04 days. (a) Convert the half-life to units of seconds. s (b) What is…
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Q: A certain isotope has a half-life of 9.06 h. What is its decay constant in s-1?
A: Given: The half life time is 9.06 h.
Q: A radioactive sample contains 1.55g of of an isotope with half a life of 3.8 days. How much of the…
A: Given data: Original amount of substance (N0) = 1.55 g Half life (T1/2) = 3.8 days Time (t) = 11.4…
Q: Plutonium-238 (238Pu) is a radioactive isotope with a half-life of 87.7 years. If a sample of 238Pu…
A: Given Half life=87.7year Activity after the=438.5year
Q: The half-life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
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Q: Co decays with a half-life of 5.27 years to produce 8 Ni. 60 (a) What is the decay constant for the…
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Q: A radioactive sample is prepared; 10.78 hours later, only 1/16th of the original sample remains.…
A: Activity N=N0e-λt 10.78 hours later, only 1/16th of the original sample remains N016=N0e-λ10.78…
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Q: The half life for the decay of carbon-14 is 5.73* 10^3 years. Suppose the activity due to the…
A: The half life for the decay of carbon-14 is 5.73* 10^3 years. A tiny sample of an artifact made of…
Q: The half life for the radioactive decay of Ce-141 is 32.5 days. If the sample has an activity of 4.0…
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- The half-life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the radioactive decay of the carbon-14 in a tiny sample of an artifact made of wood from an archeological dig is measured to be 1.0*10^ 3Bq. The activity in a similar-sized sample of fresh wood is measured to be 6.9*10^3 Bq. Calculate the age of the artifact. Round your answer to 2 significant digits.What is the half‑life of an isotope that decays to 6.25%6.25% of its original activity in 24.2 h?24.2 h? half‑life:After 1.80 days, the activity of a sample of an unknown type radioactive material has decreased to 80.4% of the initial activity. What is the half-life of this material?
- (a) At an initial time, a radioactive sample has an activity of 8.77x104 Bq. After 3.88 hours the activity is 5.35x104 Bq. (A) What is the half-life of the isotope? (B) What is the activity after an additional 3.88 hours? (A) (in s) OA: 6.426x103 OB: 9.317x103 oC: 1.351x104 OD: 1.959x104 OE: 2.840x104 OF: 4.119x104 OG: 5.972x104 (B) (in Bq) H: 8.660x104 OA: 1.387x104 OB: 1.845x104 OC: 2.454x104 OD: 3.264x104 OE: 4.341x104 OF: 5.773x104 OG: 7.678x104 OH: 1.021x105Carbon-14, with a half-life of 5730 years, has a decay constant of λ = 1.21 × 10-4 yr-1. A piece of wood from an archaeological site is found to have 1.9 % of its original carbon-14. How many years old (t) is the piece of wood? Express your answer in scientific notation. Example: 1.23e4.(a) At an initial time, a radioactive sample has an activity of 8.52x104 Bq. After 3.85 hours the activity is 5.42×104 Bq. (A) What is the half-life of the isotope? (B) What is the activity after an additional 3.85 hours? (A) (in s) OA: 2.285x103 (B) (in Bq) OA: 1.149x104 OB: 3.314x103 OB: 1.344x104 OC: 4.805x103 OC: 1.573x104 OD: 6.967x103 OD: 1.840x104 OE: 1.010x104 OE: 2.153x104 OF: 1.465x104 OG: 2.124x104 OF: OG: 2.519x104 2.947x104 OH: 3.080x104 OH: 3.448x104
- An 8 g sample of a radioactive element takes 8.42 million years to reduce into 2 g. Calculate the half-life and identify the element.Suppose that you want to find out how much gasoline is in an underground storage tank. You pour in 1 gallon of gasoline that contains some radioactive material with a long half-life that gives off 5000 counts per minute. The next day, you remove a gallon from the underground tank and measure its radioactivity to be 10 counts per minute. How much gasoline is in the tank?What fraction f1 of a radioactive sample will be left after 6 half‑lives? What fraction f2 of a radioactive sample will be left after 7.5 half‑lives?
- I need the answer as soon as possibleArcheologists can determine the age of artifacts made ofwood or bone by measuring the amount of the radioactive iso-tope ¹⁴C present in the object. The amount of isotope decreasesin a first-order process. If 15.5% of the original amount of ¹⁴C is present in a wooden tool at the time of analysis, what is theage of the tool? The half-life of ¹⁴C is 5730 yr.