Gold-198 has a half-life of 2.7 days. How much of a 953.1 mg gold-198 sample will remain after 13.5 days? 1231.90 mg mass remaining: Incorrect What is the half-life of an isotope that decays to 25% of its original activity in 35.3 h? half-life:

Q: The half-life of cobalt-60 is 5.26 years. If 50 g are left after 15.78 years, how many grams were in…

A: The  formula that relates the mass remaining of the radioisotope to the original mass is given below…

Q: The half-life of nucleus Rn-222 is 3.88 days. How many mg of a 5000 mg sample of Rn-222 remains…

A: The half life of a given reaction refers to the time required by a given compound to reduce to half…

Q: A sample of 113mIn has a half-life of 100. minutes. What amount of 113mIn remains (in CPM) if a…

A: Like chemical reactions, nuclear reactions are type of chemical reaction only but here in place of…

Q: 206 °Hg. If you start with Pb has a half-life of 22.3 years and decays to produce 8.79 g of 210 210…

A: Given,

Q: 9.) Strontium 90 is a major component of the detonation of nuclear explosives: it is I dangerous…

A: We know that no of atoms  N Present at time t  are given as N= N° e-kt where N° are the initial…

Q: What is the half-life of an isotope that decays to 25% of its original activity in 17.8 h?…

A: Given:- Let initial activity of an isotope=No Activity of isotope decayed in 17.8 h= x = 25% of No…

Q: Answer the following questions regarding the radioactive isotope polonium-210. A.Write a nuclear…

A: Since. Your question has multiple subparts. We will solve only the first three sub-parts to get the…

Q: How many days will it take for a radioactive isotope with a half-life t1/2 = 134 days to decay to…

A:

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: 15. A mammoth skeleton has a carbon-14 decay rate of 0.48 disintegrations per minute per gram (0.48…

A:

Q: 8. Patients with Graves disease have an overactive thyroid gland, and are commonly treated with…

A: Given the half-life of I-131, t1/2 = 8.0 days Initial activity, Ao = 9.9 mCi

Q: A 1.00-gram sample cantains two radioactive isotopes A and B. The half-life of isotope A is 2 hrs.…

A:

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

A:

Q: Answer the following questions regarding the radioactive isotope polonium-210 A.Write a nuclear…

A: Since. Your question has multiple subparts. We will solve only the first three sub-parts to get the…

Q: -33. The number of radioactive nuclides in a sample decays from 1.00 × 1020 to 2.50 × 10º in 10.0…

A:

Q: Time (days) If the initial sample is 6.50 g, what mass of the original iridium-192 remains after 150…

A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want…

Q: What is the age of a fossil that has a carbon-14 decay rate of 6.5 disintegrations per minute per g…

A: Formula used y=a e-nt where y is the final  amount of death = 6.5dis/min           x is the initial…

Q: phosphorus-32 is a radioactive isotope with half-life of 14days. a biochemist has a vial containing…

A: The radioactive isotopes follows the first order reactions, which is dependent upon the…

Q: Time (days) If the initial sample is 2.25 g, what mass of the original iridium-192 remains after…

A:

Q: How many half-lives have passed in each of the following situations? (a) Initially the sample is…

A: SOLUTION: Step 1: (a). Half-life is the interval of time required for one-half of the atomic nuclei…

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

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

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 3.80 billion years old by…

A:

Q: A skull believed to belong to an ancient human being has a carbon-14 decay rate of 6.50 dis/min.g of…

A: Radioactive disintegration follows first order reaction and decay rate equation can expressed as,…

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…

Q: Phosphorus-32 is used in biochemical studies to follow the pathway taken by metabolites. Its…

A:

Q: 1.What is the half-life of 99Tc if a 500.0 g sample decays to 62.5 g in 639,000 years 2)How much of…

A: Given,Mass 500 g,Therefore, the first half-life is 250.0g.Second half-life is 125.0g.Third half-life…

Q: The half-life of iron-59 is 44.5 days. How much of a 3.00-mg sample will remain after 222.5 days?

A:

Q: Iodine‑125 (I125I125) is used to treat, among other things, brain tumors and prostate cancer. It…

A: Answer is as follows

Q: If the initial sample is  1.25 g,  what mass of the original iridium‑192 remains after  65  days?…

A: Given, mass of sample = 1.25 g time, t = 65 days mass remained =0.675 g

Q: A sample of niobium contains 2.50 micrograms of Nb-95.  Determine the activity of the sample in…

A: Interpretation -  To determine the activity of the sample in millicuries when a sample of niobium…

Q: Cobalt-60 is radioactive and has a half life of 5.26 years. How long would it take a sample to decay…

A: Given- Half life=5.26 years  Initial amount=1.90mg Final amount=1.50mg

Q: Phosphorus-32 is a radioactive isotope with a half-life of 14.3 d (d = days). A biochemist has a…

A: Radioactive decomposition follows first order kinetics. Integrated rate law for first order is

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 4.00 billion years old by…

A:

Q: barium -131 is a radioisotope used to study bone formation. a patient ingested barium -133. how much…

A:

Q: A sample has a half life of 100 years. If it has been 200 years since it started to decay and there…

A: The question is based on the concept of chemical kinetics. we have to calculate initial mass of the…

Q: If the initial sample is 2.50 g, what mass of the original iridium-192 remains after 5 days? 1.5…

A:

Q: How many half-lives have passed in each of the following situations? How much of a 48.0 g…

A: 1. The given half life of iodine-134 is 50 minutes. The total number of half-lives observed in 150…

Q: radioactive isotope has an activity of 9.94×104 Bq initially. After 3.35 hours the activity is…

A:

Q: It is well known that any radiocarbon takes several decades to disintegrate. In an experiment, only…

A:

Q: If the initial sample is 8.00 g, what mass of the original iridium-192 remains after 105 days? 0.675…

A:

Q: unknown sample contains radioactive element U-235. If the original amount present is 3500 atoms, how…

A: Given- Number of initial atom =3500 atoms Number of final atom =125 atoms  Half life =700 million…

Q: Ruthenium-106 (106Ru) is used to treat melanoma in the eye. This isotope decays by β– emission with…

A: In general, Number of proton is equal to the number of atomic number.The atomic number of is 44,…

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 4.20 billion years old by…

A:

Q: Calculate how long will it take for a sample of a radionuclide with a half-life of 39.9 days decay…

A:

Q: he half-life of chromium-51 is 28 days. If the sample contained 510 grams, how much chromium would…

A: Given that

Q: Next step of the neptunium-237 decay series, very unstable francium-221 is produced. The half-life…

A: Given: Half-life of  francium-221 = 5.00 minutes Initial mass of francium-221 = 6.12 grams Time…