Consider 250g of iodine which decomposes at a rate proportional to the amount present. Around 150g of iodine decomposes in 10.5754 days. What is the proportionality constant k? What is the half-life of iodine?

Q: Strontium-90 is one of the radioisotopes released in the Chernobyl nuclear plant accident. The…

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

Q: The half life for the radioactive decay of rubidium-87 to strontium-87 is 4.88 x 10" years. Suppose…

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

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Q: The radioactive isotope of lead , Pb-209, decays at a rate proportional to the amount present at…

A: Given information: Half-life = 3.3 hours Amount decayed = 90%

Q: The half life for the radioactive decay of carbon-14 to nitrogen-14 is 5.73 × 10° years. Suppose…

A: Carbon 14 →Nitrogen-14 Half life t1/2 = 5.73×103 years In a nuclear reaction Nitrogen-14 is 0.524…

Q: The half-life of strontium-87 is 2.8 h. What percentage of this isotope will remain after 8 h and 24…

A: Radioactive decay is the breaking of unstable nuclei into stable ones by emitting radiation. These…

Q: What fraction of a sample of ²P will be left after 42.9 d?

A: Given, the isotope is 32P. What fraction of 32P will be left after 42.9days?

Q: The isotope 226Ra has a half-life for the radioactive decay of 1600 years. How long will it take the…

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Q: Strontium-90 is one of the radioisotopes released in the Chernobyl nuclear plant accident. The…

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Q: The half-life of the radioactive isotope uranium-234 is 2.47 × 10° years. How long will it take for…

A: We have given that  Half life of Uranium-234 = t1/2 = 2.47×105 years [N]0 = 72.4 μg  [N]t = 9.05 μg…

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Q: The half-life of 90Sr is 28 years. How long will it take for a given sample of 9°Sr to be 83%…

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Q: Radium decomposes approximately at a rate proportional to the amount present. If it is 100 grams…

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Q: What is the half-life of a sample if after 40 years 12.5g of an original 0.4kg sample is left?

A: Given that,  Initial mass of sample = 0.4 kg = 400 g  Mass of sample left after after 40 years =…

Q: What is the half-life, in seconds,

A: A second order reaction is the reaction where the rate of the reaction depends upon both the…

Q: The half-life of is 0.220 years. How much of a 500.0 mg samnple remains after 24 hours? A. 496 mg B.…

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Q: The half life for the radioactive decay of rubidium-87 to strontium-87 is 4.88 × 10*° years. Suppose…

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Q: Analysis of argon-40 in a rock sample using a mass spectrometer was performed. It was found out that…

A: The nuclear reaction for the decay of K-40 to Ar-40 is: K1940 → A1840r + β+10 Given the half-life of…

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

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Q: A 0.100 g of Tc -99 sample is used in a medical study. How much of the Tc- 99 sample remains after…

A: Tc-99 sample = 0.100 g half life of Tc-99 = 6 hours. to find mass after 24 hours. Radio active decay…

Q: ives? A sample of Oxygen-19 has decayed down to 1/32 of its initial concentration a What is the…

A: We have to find half life

Q: Radioactive material is known to decay at a rate proportional to the amount present. Initially there…

A: As per our guidelines we can only solve first question. Please resubmit the other questions as next…

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: The half-life of Plutonium-241 is 9 years. How much of an initial 190 g sample will remain after 31…

A: The half-life of Plutonium-241, t1/2 = 9 years Initial mass of Plutonium-241, No = 190 g time…

Q: The half-life of cesium-137 is around 30 years, its rate of decay is proportional to the amount…

A: All decay reactions follow first order kinetics For first order reaction,   rate constant, k =…

Q: Radium decomposes at a rate proportional to the amount present. If half of the original amount…

A: It is given that that half of the original i.e. initial amount disappears after 811 years for…

Q: Consider 250g of iodine which decomposes at a rate proportional to the amount present. Around 150g…

A: According to question, Initial amount of iodine = 250 g

Q: If the first-order half-life of tritium (³H) is 12.26 years, what amount of time is necessary for it…

A: Given data : half-life of tritium (³H) is 12.26 years Let the initial amount be x. Also given that,…

Q: How much phosphorus-32 remains from a 1.00 gram sample after three half-lives?

A: Given :  initial amount of sample i.e. ao = 1.00 g  To calculate :  amount of sample left after 3…

Q: An isotope of thorium, 227Th, has a half-life of 18.4 days. How long will it take for 83% of the…

A: The correct answer of the question is given below

Q: The half life for the radioactive decay of carbon-14 to nitrogen-14 is 5.73 × 10³ Suppose nuclear…

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Q: The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 2.000-mg sample remains after 9.50…

A: First of all let's see the given data in the question, Half-life of cobalt-60 ( t1/2 ) = 5.20 years…

Q: If a sample has a half-life of 1 hour, how much of a 10.000 g sample would remain after 2 hours?

A: Any atomic nucleus which is mainly unstable tends to lose energy through radiation and this process…

Q: The half-life of Oxygen-15 is 2 min. What fraction of a sample of O-15 will remain after 5 half…

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Q: If 32 g of such substance, the remaining amount be after 4 half-life is --- g 8. 16 O 2

A: Radioactivity Decay is a process in which an unstable nuclei looses energy by radiation. A material…

Q: The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 2.000-mg sample remain after 9.50…

A: Given information,     The half-life of cobalt-60 is 5.20 yr.     Mass of sample 2.000-mg     Time…

Q: The half life for the radioactive decay of carbon-14 to nitrogen-14 is 5.73x 10^3 years. Suppose…

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Q: Strontium-90 is one of the radioisotopes released in the Chernobyl nuclear plant accident. The…

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Q: The half life for the radioactive decay of carbon- 14  to nitrogen- 14  is  ×5.73103  years.…

A: Half life of radioactive element-is the time needed for given number of its nuclei to decay exactly…

Q: A 56.6 mg sample of sodium perchlorate contains radioactive chlorine-36 (whose atomic mass is 36.0…

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Q: The half life for the radioactive decay of carbon-14 to nitrogen-14 is 5.73 x 10 years. Suppose…

A: calculation of age of the rock half life of C-14 is given Amount of N-14 and C-14 is given

Q: The rate of decay of radium is proportional to the amount present at any time. The half-life of…

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Q: Radium decomposes at a rate proportional to the present amount. The half life of Radium is 1600…

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Q: Americium-241 is widely used in smoke detectors. The radiation released by this element ionizes…

A: Answer:- this question is answered by using the simple concept of nuclear chemistry which involves…

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: 10 The half life for the radioactive decay of rubidium-87 to strontium-87 is 4.88 × 10" years.…

A: This is a first order reaction and hence the half life is, t1/2 = 0.693/k

Q: The half life for the radioactive decay of potassium-40 to argon-40 is 1.26 × 10° years. Suppose…

A: Given: The half-life for the radioactive decay of potassium-40 to argon-40 = 1.26×109 years The rock…

Q: The half-life of bromine-74 is 25 minutes.  How much of a 40 cpm sample is still active after 75…

A: Since bromine-74 is a radioactive element  hence it will have decay reaction  And since the decay…

Q: The half-life of Strontium-85 is 65 days. How much of a 80. mg sample is left after 260 days? mg

A: Given: Initial mass of sample = 80 mg  Time passed = 260 days. And the half-life of isotope = 65…