o-60 is used extensively in radiotherapy as a source of y-rays. Its half-life is 5.27 years. a) How many years will it take to decrease to 35% of its original activity? b) If a cobalt source is ten years old, what percent of its original activity remains?

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A: Calculate the value of rate constant (k):

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A:

Q: What is the half-life of a radioactive substance if after 5 years 95 percent of an initial amount…

A: Half life of a given radioactive substance is that time duration in which it's amount reduced half…

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A: half life = 5.27 years

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Q: The half-life of Ga-67 is 77.9 hours. How long will it take Ga-67 to decay and lose 95% of its…

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A: Given, Half life = 25.3days

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A: Here by applying first order disintegration equation ,we can determine the age of artifacts.

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A: Given: half life, t12=5.27 years[A]=0.2[A]o To calculate: Years taken to decrease to 20% of its…

Q: If 29.5% of the original amount of 14C is present in a wooden tool at the time of analysis, what is…

A: Since the carbon decay is a first order kinetics reaction Hence for the first order reaction we can…

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A: Given -> Half life = 3.82 days

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A:

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Q: 24 Am is used in many home smoke alarms. It has a decay half-life of 457 years. How long does it…

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Q: What is C-14 activity in a sample that is 2.0 x 104 yr old? Assume that C-14 activity in the living…

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Q: A normal adult jawbone contains 200 mg of Carbon-14 in a living person. If scientists found a…

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Q: 11047Ag → 0.je + 110 48Cd For the nuclear reaction Starting with 200. g of Ag-110 in a container,…

A: Since you have asked multiple question, as per our company guidelines we are supposed to answer the…

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Q: What is the half-life of iron-55 if 5.93 years are required for the activity of a sample of iron-55…

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Q: The half-life of Ga-67 is 77.9 hours. How long will it take Ga-67 to decay and lose 95% of its…

A:

Q: A normal adult jawbone contains 200 mg of Carbon-14 in a living person.  If scientists found a…

A:

Q: The half life for the decay of carbon-14 is 5.73 x 10³ years. Suppose the activity due to the…

A: Given: The half-life of carbon-14 = 5.73 × 103 years The activity of the sample = 81 Bq The activity…

Q: The half-life of tritium is 12.4 years. How long will it take for 15% of a sample of tritium to…

A: The radioactive decays are first order reaction.

Q: If a rock sample was found to contain 4.30 x 10-7 mol of argon-40, how much potassium-40 would also…

A: Nuclear disintegration follows first order kinetics  λ=2.303 log(A0/A)/t  λ=0.693/t1/2 or 0.693/t1/2…

Q: E Reae The half life of chromium-51 is 27.8 days. How many days are required for 15/16 of a sample…

A: Chemical Kinetics  1st order Kinetics  Nuclear Decay  Step-2 Has further calculation

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A: The answer to the following question is-

Q: decay

A: T1/2 = 28 yrs N = 0.40 g No = ? at T = 56 years

Q: How much of a 0.15 g sample of U-238 after the passage of 3200 years? Half-life is 4.01x10^9 years.

A:

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A: Given: The half-life for the decay of carbon= 5.73×103 years The activity of fresh wood sample= 99…

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Q: a. i. The half-life of 20 kg of Bismuth -210 is 20 minutes. Explain this statement? ii. A…

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A: Given: 9.10×109 years are required for the activity of a sample of uranium-238 to fall to 24.7…

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A: As per the rules, only three sub-parts can be answered:

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Q: The half-life of carbon-14 is about 5730 years. If an ancient leather strap is about 11,500 years…

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Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.