Time (days) If the initial sample is 2.25 g, what mass of the original iridium-192 remains after 55,days? mass remaining: Estimate the half-life of the radioisotope. half-life: days How many days would it take for one-fourth of the sample to decay? time: days

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

Q: Iodine -125 emits gamma rays when it decays to Tellerium -125 and has a half life of 60 days. If…

A: Given, half life of Iodine -125 t1/2 = 60 days            initial mass of Iodine -125 = 0.020 g The…

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

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: After 4.00 years, 2,000g of a radioisotopes remains from a sample that had and original mass of…

A: There is some mistake in 1st part  If the left amount is 2.0g then half-life is itself 4 years

Q: Zinc-62 decays with a half-life of 9.186 hours. After 12.80 days, a radioactive nuclide has passed…

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Q: Suppose the amount of a certain radioactive substance in a sample decays from 8.50 mg to 3.80 mg…

A: Given Initial concentration of radioactive substance =          8.50mg Final concentration of…

Q: What is the original mass of C-14 in a sample if 10.00 mg of it remains after 20,000 years? The…

A: The C-14 decays according to first order kinetics. Since we know that the relationship between the…

Q: After 12.80 days, a radioactive nuclide has passed through exactly five half-lives. The initial…

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Q: An unknown radioisotope exhibits 8540 decays per second.After 350.0 min, the number of decays…

A: Nuclear reactions are a type of chemical process which lead to the formation of some new nuclei with…

Q: Nickel-56 decays with a half-life of 6.075 days. After 5.69 hours, a radioactive nuclide has passed…

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Q: Magnesium-27 is an unstable radioisotope. For it to become stable, it has to undergo

A: Mg has 27 mass no. and 12 atomic number. Hence, it has 12 protons and 27-12 = 15 no. of neutrons.…

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: A sample of sodium thiosulfate, Na2S2O3, contains sulfur-35. Determine the mass of in the sample…

A: Given, Half life of sodium thiosulfate = 88 days

Q: Use the radioactive decay curve of iridium-192 to answer the three questions A. If the initial…

A: Radioactive decay is the procedure in which the energy of an unstable atomic nucleus falls by…

Q: The half-life of Polonium-218 is 3.00 minutes.  How many half-lives pass after 18.0 minutes ?  The…

A: Concept - Radioactive decays are first order reactions. So we use the formula, Nt = No(1/2)n, where…

Q: PET scans require fluorine-18, which is produced in a cyclotron and decays with a half-life of 1.83…

A: Given: Half life, T1/2 = 1.83 hrVelocity of transport, v= 60.0 miles/hrfinal Concentration of F-18 =…

Q: The half-life of Po-214 is 0.001 seconds. How much of a 10 gram sample is left after 0.003 seconds?

A: Half life of Polonium, t1/2 = 0.001 second Mass of sample = 10 g

Q: A certain artifact is tested by carbon dating and found to contain 73% of its original carbon-14. As…

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Q: The half-life of cesium-137 is 30 years. Suppose we have a100-mg sample.(a) Find the mass that…

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Q: The amount of a radioisotope that remains after two half-lives have passed is:

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Q: The half-life of 90Sr is 28.8 years. How long will it take (in years) for a 86.1 mg sample of 20Sr…

A: Given t= 28.8 years. t1/2 = ?

Q: The time it takes for half of a radioisotope's atoms to decay (like Carbon-14) ___.   is used to…

A: Half life is the time required by a quantity or a substance to reduce to half of its initial value.…

Q: It takes 870.98 years for carbon-14 to decay to 90 mg. What is the half life of carbon-14?

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Q: he half-life of polonium-210 is about 140 days. How much of a 150g sample remains after t years?

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Q: 8. A radioisotope is going to be used in an experiment. At the end of 10 days, only 5% is to be…

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Q: after 5.69 hours, a radioactive nuclide has passed through exactly five half-lives. the initial…

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Q: The half-life of carbon-14 is approximately 5730 years. At an archacological dig a fossil is…

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Q: One of the nuclides in spent nuclear fuel is U-235, an alpha emitter with a half-life of 703 million…

A: Using the given half-life period, rate constant, k can be determined.

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Q: A certain substance is known to decay at a rate proportional to the present amount. Initially, there…

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

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

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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: what is the half life of an isotope that decays to 25% of its original activity in 68.9 hours?

A: For a first order reaction, rate constant can be calculated as

Q: The radioactive nuclide Plutonium-199 has a half-life of 43.0 min. A sample is prepared that has an…

A: Half-life of radioactive substance: T1/2 = 43.0 min Initial activity of radioactive substance: AO =…

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Q: If a tree dies and the trunk remains undisturbed for 1.635 × 10⁴ years, what percentage of the…

A: Given, time t = 1.6 x 104 years , half life t1/2 = 5730 years

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Q: A theoretical isotope known as Du-30 has a half life of 6 months. The amount decreased from 1.50M to…

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

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Q: A 25-g sample of a pure radioisotope decayed until approximately 1 gram remains. If it took 245 days…

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Q: A sample of wood from an Egyptian mummy case gives a count of 8.4 cpm/gC (counts per minute per gram…

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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.