QUESTION 14 Given the first order constant of the radioactive decay of carbon-14 to the stable nitrogen-14 is 121 x 10-6 /yr, 10 mM of carbon-14 is present in a solution, how much carbon-14 is left after 4000 years? O 9,9 mM O 8.7 mM 6.2 mM 5.1 mM

Q: A medical technician is working with the four samples of radionuclides listed in the table below.…

A: half life of sample A to D is given in the table We need to arrange order of radioactivity of the…

Q: Isotope of uranium 234U decays to thorium by the alpha decay with the half-life of 7.73 x 1012 s.…

A:

Q: If a tree dies and the trunk remains undisturbed for 13,589 years, what percentage of original…

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Q: The half-life of Pxygen-15 is 2 minutes. What fraction of the sample will remain after 10 minutes…

A:

Q: lodine-131 is used in the treatment of tumors in the thyroid gland. Its half-life is 8.1 days.…

A:

Q: The half-life for the first order radioactive decay of lodine - 131 is 8.0 days. After 3 half lives,…

A: Given, Half life for the first order radioactive decay of iodine-131 = 8.0 days After 3 half lives…

Q: How many half lives have passed if we measure 1 µg/g parent isotopes and 15 µg/g daughter isotopes…

A: Given: The amount of parent isotope in the rock sample = 1 μg/g The amount of daughter isotope in…

Q: The first-order decay of radon has a half-life of 3.823 days.  How many grams of radon decomposes…

A:

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: Carbon-14 is used in radiocarbon dating. The half-life of carbon-14 is 5.73 x 10° years. How many…

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Q: What is the half-life of polonium-210 if it takes 828 days for a 100.0 g sample to be reduced to 1.6…

A: Polonium-210 is a radioactive element so it's decay is followed first order kinetics.

Q: Determine the time required for a sample of cesium-137 to decay until only 1/8 of the original…

A:

Q: Phosphorus-32 is a radioisotope. It is typically used as a tracer in biological research or to treat…

A: Given,Ordered sample of P32 = 950 mgTime required for shipping = 42.9 daysHalf-life of P32 = 14.3…

Q: The first-order decay of radon has a half-life of 3.823 days.  How many grams of radon decomposes…

A: Given  Half life ( t1/2 ) = 3.823 days  Time ( t )          = 5.55 day  Initial Amount ( A0 )   = 80…

Q: Radium-223 decays with a half-life of 11.4 days. How long will it take for a 0.240-molmol sample of…

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Q: Iodine-131 is used in the treatment of thyroid disease. What is the half-life of iodine-131 if a…

A: Weight of sample initially = 160mg Weight of sample finally = 5mg Time elapsed = 40 days We have to…

Q: The half-life of bromine-74 is 25 min.  How much of a 4.0 mg sample is still active after 75 min.

A: The integrated rate law expression for the first-order kinetics is: k = 1tlnAoAAo = initial…

Q: Element X has a half-life of 6 hours. How much of X remains from a 64kg sample after one day?

A:

Q: Rubidium-87, 87 b, decays by beta emission to strontium-87, 87Sr. The ratio of strontium-87 to…

A: The ratio of strontium-87 to rubidium-87 is 0.2194, that is  = 0.2194.The half-life of  rubidium-87…

Q: The 1st-order decay of a particular radioactive element has a half-life of 1.234 days. How many…

A: Given information, Half-life = 1.234 days Time (t) = 5.67 days Initial mass = 891.0 grams

Q: The half life of bromine-74 is 25 min. How much of a 4.0 mg sample is still active after 75min

A: Since the decay reactions are first order reactions  Hence the half life = ln(2) / K where K = decay…

Q: plutonium 239 produced in breeder reactors has a half-life of 24100 years how long will it take for…

A: Answer: Time for 10% decay of Pu-239 is 3665.175 years

Q: Uranium-232 is a radioactive isotope with a half life of 68.9 years.How long in years will it take…

A: The radioactive decay process follows first-order kinetics. The half-life is the time required to…

Q: After 2 days, 10g of radioactive chemical is present. Three days later, 5g is present. How much of…

A: Given : After 2 days, the mass of chemical = 10 g After more 3 days i.e total after 5 days from…

Q: Please use the values in the Technetium-99m has a half life of 6.01 hours. If a patient injected…

A:

Q: Iodine-131 is used in the diagnosis and treatment of thyroid disease and has a half-life of 8.0…

A: Formula: Since Iodine is a radioactive substance, it follows the 1st order rate law. The half-life…

Q: The radioisotope phosphorus-32 is used in tracers for measuring phosphorus uptake by plants. The…

A: Given : Half life of phosphorus-32 = 14.3 days And the final activity of sample of phosphorus-32 =…

Q: What is the half life of sodium-24 if after 12 days the sample has a mass of 1.2 g from an initial…

A: Given, Initially mass of the sample (N0) = 9.6 g Mass of the sample after 12 days (N) = 1.2 g Time…

Q: What is the half- life of a radioisotope if it decays to 12.5% of its radioactivity in 12 years?

A: Let the initial concentration of the radioactive substance be A. The concentration of the substance…

Q: The first-order decay of radon has a half-life of 3.823 days. How many grams of radon remain after…

A: Given,

Q: The radioactive isotope Cr decays by beta emission. 56 24 If the mass of a sample of chromium-56…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Photochemistry

Photochemistry is the part of chemistry that studies the various mechanisms of reactions that are triggered by the presence of light energy. It also helps to study the changes involved in a molecule that can undergo the absorption of radiation.