Q1 A sample of leather is analyzed by carbon-14 dating. The concentration of 14C in this sample is found to be about 1/16th of what a modern leather sample would contain. About how old is the sample? The half-life of 14C is 5,370 years.

Q: Phosphorus-32 is a radioisotope used in the treatment of leukemia and pancreatic cancer. If the…

A: Given, Phosphorus-32 in a sample decreases from 1.2g to 0.30g in 28 days . We have to calculate half…

Q: Substance D initially weights 56 grams. After 6 minutes, it was observed that its mass decreased by…

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Q: A sample of radioactive technetium-99 of half-life 6 hh is to be used in a clinical examination. The…

A: Given: Half-life of isotope = 6 hours. And the time passed = 15 hours.

Q: Although most natural potassium nuclei are stable K (93.3%) or **K (6.7%) nuclei, about 0.0117% are…

A: Potassium exists in nature in form of two isotopes : 1. 39K ; Abundance = 93.3 %  2. 41K ; Abundance…

Q: The fraction of a radioactive isotope remaining at time t is (1/2)t/t1/2 where t1/2 is the…

A: Decay reactions are first order reactions. Since we know that the relationship between the amount of…

Q: A sample of 400g of radioactive​ lead-210 decays to​ polonium-210 according to the function…

A: Given data : A sample of 400g of radioactive​ lead-210 decays to​ polonium-210. According to the…

Q: Iodine-131 is used medically for the diagnosis of thyroid illnesses. The rate constant for t decay…

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Q: Carbon-14, a naturally occurring unstable isotope of carbon, has a half-life of 5,730 years. In a…

A: Given: Half-life = 5730 years. Initial concentration of carbon-14 isotope = 1.5 ppt  And time passed…

Q: Chromium-51 is a radioisotope that is used to assess the lifetime of red blood cells The half-life…

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Q: The isotope nickel-63 has a half-life of 100 years. If a tested sample has five grams of nickel-63…

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Q: 6. Iodine – 131 is used in the form of sodium iodide to treat cancer of the thyroid. The isotope has…

A: half - life = t1/2 = ln 2λ Given that,t1/2 = 8.04 days Ao = 25 mg t = 32.2 days

Q: Iodine-131 used to treat hyperthyroidism, has a half-life of 8.04 days. For a sample containing 10.0…

A: Half life time = 8.04 days  Initial mass = 10.0 μg  Time = 32.2 days Mass remain after 32.2 days = ?…

Q: The half-life of radioactive carbon ( 14C) is 5,370 years. If a sample of organic material contains…

A: Given that, The half-life of radioactive carbon ( 14C) is as given below --- t1/2 = 5,370 years The…

Q: A zircon sample contains 4000 atoms of the radioactive element 235U. Given that 235U has a half-…

A: Time required to decay to 125 atoms os given below

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

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Q: In a moon rock sample, the ratio of the number of stable 4°Ar atoms present to the number of…

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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: 11. The half-life of a newly discovered element, Jimmium, is 55 minutes. How long will it take a…

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Q: Chromium-51 is a radioisotope that is used to assess the lifetime of red blood cells The half-life…

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Q: Radioisotope X has a half-life of 4.0 h. Based on the figure below, if the original sample of the…

A: Half life (t1/2) :-  The time required for the concentration of reactant to reduce to half of its…

Q: Chromium-51 is a radioisotope that is used to assess the lifetime of red blood cells The half-life…

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Q: If 28.0% of a sample of silver-112 decays in 1.52 hours, what is the half-life of this isotope (in…

A: Given values,      28% sample of silver=112 decays in 1.52 hours      that means 72% sample…

Q: Carbon dating can be applied to organic materials up to 5.0 × 104 years old. What percentage of the…

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Q: 4. The man-made isotope technetium-99 ("Tc) has a half-life of 211,000 yrs. (a) How many neutrons…

A: Isotope is an atom which have same number of electrons and protons but different number of neutrons.…

Q: The isotope 32P emits radiation and has a half-life of 14.3 days. Calculate the decay constant in…

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Q: Chromium-51 is a radioisotope that is used to assess the lifetime of red blood cells The half-life…

A: Given: The half life, (t1/2)=27.7 days. The initial concentration of Cr-51=28.7 mg 981

Q: In medical application prior to having an MRI, a patient will be administered a dye containing a…

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Q: Q1: If you know that the half-life of a radioactive element is equal to 20 days, find the following:…

A: Radioactive active decay generally follows a first order reaction and therefore, the rate of…

Q: A radioisotope “X” has a half-life of 2.5 years. Determine (to the nearest 0.1 mg) how much of a…

A: All the radioactive reactions follow first order kinetics . The term half life is defined as the…

Q: Radioactive decay The radioactive bismuth isotope 21°BI has a half-life of 5 days. If there is 100…

A: The amount of radioactive substance remaining after t days is given by, ft=1002−t/5

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

A: Given half life = 8.04 days time = 12.7 days initial mass = 31.1 mg

Q: If 28.0% of a sample of gallium-66 decays in 4.46 hours, what is the half-life of this isotope (in…

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Q: (Q114) A meteorite recovered from a meteor landing site in the Australian outback contains 0.438 g…

A: we have to calculate the age of meteorite

Q: Isotope X has a half-life of 71.8 years. If a sample initially contains 676. mg of X, what mass of X…

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Q: Phosphorus-32 is a radioisotope used to detect certain types of tumors. P-32 has an effective…

A: Phosphorus-32 is a radioisotope used to detect certain types of tumours. P-32 has an effective…

Q: A nuclear power plant emits into the atmosphere a very small amount of krypton-85, a radioactive…

A: Given: Half life (t1/2) = 10.76 years  Total time (T) = 25 years

Q: original

A: t1/2 =  8.02 days t = ? for 99% decay

Q: If a tree dies and the trunk remains undisturbed for 1.195 × 10⁴ years, what percentage of the…

A: Carbon dating is a technique to estimate the age of the tree or rock

Q: A radioactive isotope has a half-life of 14.8 hrs. Calculate its rate constant.

A: Since all the radioactive decays are first order decay reactions

Q: If 28.0% of a sample of copper-64 decays in 6.16 hours, what is the half-life of this isotope (in…

A: We will use formula of rate constant first order kinetics

Q: If 28.0% of a sample of technetium-99 decays in 2.84 hours, what is the half-life of this isotope…

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Q: A sample of a newly discovered element, West Virginium, has been discovered.  A 167 mg sample has…

A: We will use first order kinetics to solve this question.

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

A: Radioactive decay follow first order kinetics.

Q: Iodine-131 is often used in nuclear medicine to obtain images of the thyroid  If you start with…

A: Half-life is the time required for a quantity to reduce to half of its initial value. we represent…

Q: Iodine-131 is a radioactive isotope. After 2.00 days, 84.2% of a sample of 13I remains. What is the…

A: Iodine- 131 is an radioactive isotope. Time = 2 days Final concentration of 131l  = 84.2% of sample…

Q: The half-life of carbon-14, an isotope used in archaeological dating, is 5730 years. What percentage…

A: The age of the sample follows first order kinetics. This method is known as carbon dating. First…

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

A: