The half-life of element X is 500 years. If there are initially 8 g of X, how much will remain after 1500 years?

Q: Plutonium-239 is a byproduct of the fission reaction used to produce energy in nuclear power…

A: Given data,Half life=24400yearstime=97600years

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Q: Element X has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10…

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

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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: Krypton-81 has a half-life of 2.29 × 105 years. A 750-mg sample of Krypton-81 undergoes electron…

A: Since you have posted a question with multiple sub-parts as per our company guidelines we are…

Q: Americium-241 is widely used in smoke detectors. Calculate the amount of americium-241 consumed in a…

A: The radioactive substances mainly possess decay process through first-order kinetics and half-life…

Q: A particular isòtope of an element has a half-life of 75.0 hours. What percentage of the sample will…

A: All isotopic decomposition follows the first order reaction kinetics. So using integrated rate…

Q: what percentage of the strontium-90 that was made 1945 still exsist now in the year 2021? the…

A: Given , Strontium -90  half life t1/2=28.9 initial concentration (concentration in 1945) = CA0 final…

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: What is the half-life of an element that begins with 100g, and 18.8g remains after 113 minutes.

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

Q: How to find the half-life of the element in the function A(t)=10e−0.0315t

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Q: If 50% (1/2)of a radioactive element remains after 4000 years, what is the half-life

A: Half life of a radioactive element is the time required to disintegrate into it's half…

Q: The half-life of 129I is 1.72 x 107 years. Consider a sample that contains 2.39 x 106 atoms of this…

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Q: Element X has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10…

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Q: A radioactive element has a half-life of 1.1 hours. How many hours will it take for the number of…

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Q: The half-life of element X is 20 days. How much of an 80 g sample remains after 80 days?

A: Given :  Half life of element = 20 days  Initial amount of sample = 80 g  To calculate :  Amount of…

Q: The decay constant for the element X is 6.931 yr⁻¹. What is the half-life?

A: Relation between decay constant (K) and half life (t12) of an element:-t12 =0.693K

Q: Cesium-134 is a β emitter with a half-life of 2.0 years. How much of a 2.50-g sample of cesium-134…

A: The radioactivity decay follows the first order kinetics. The formula for the first order kinetics…

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

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Q: The half-life of a certain radioactive element is 800 years. How old is an object if only 12.5% of…

A: Given, Half Life t1/2 = 800 years. A = 12.5%  Ao = 100 %  Time , t = ?

Q: Using applications of Differential Equations. The half-life of carbon 14 is 5730 years. It takes…

A: The correct option is (d) Half life of carbon-14 is is 5730 as it is clearly given in question.

Q: The half-life of cesium-137 is 30 years. Suppose we have a 12-g sample. (a) Find a function  m(t) =…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: 19. The half-life of the radio-isotope iodine - 131 is 8 days. What fraction of the original iodine…

A: Half life of the reaction is the time in which the reactant becomes half of the initial reactant. It…

Q: The half-life of radioactive chromium-51 is 28 days. If a sample of chromium-51 has a mass of 12.0…

A: Given, Half Life , t1/2 = 28 days First, calculate rate constant ,K to calculate time (t)

Q: The half-life of Radium-226 is 8 years. How much of an initial 171 g sample will remain after 43…

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

A: Since the decay reactions are first order reactions always hence for the first order reaction we can…

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: Thallium-201 is used medically to diagnose heart problems. The half-life of thallium-201 is 72.9…

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Q: The half-life of radioactive chromium-51 is 28 days. If a sample of chromium-51 has a mass of 12.0…

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Q: 11. Cesium-137 has a half-life of 30 years. What percent of the radioactive cesium parent atoms will…

A: Please note- As per our company guidelines we are supposed to answer only one question. Kindly…

Q: (c) Given that radioactive cobalt-60 has a radioactive constant equal to 7.6 x 10 s', determine its…

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Q: The half-life of 90Sr is 29 years. What fraction of the atoms in a sample of 90Sr would remain 175…

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Q: How many half-lives does it take a 10.0 gram sample of 12353I to drop to 0.625 grams? What length…

A: The time has to be calculated

Q: Barium -122 has a half-life of 2 minutes.  Suppose you obtain a sample weighing 10.0g and it takes…

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Q: Strontium-90 is produced during the nuclear fission of uranium-235 and is part of nuclear fallout…

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Q: The half-life of Palladium-100 is 4 days. After 20 days a sample of Palladium-100 has been reduced…

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Q: What is the half-life of Californium- 252 based on the graph below?

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Q: What is the half-life of chromium-56 if 12.8 minutes are required for the activity of a sample of…

A: Radioactive decay follow first order kinectics . Half life for first order reaction  = 0.693/k  k is…

Q: Strontium-82 has a half-life of 25.5 days. If you start with 100.0 g on January 1st 2018,…

A: Strontium-82 has a half-life of 25.5 days. If you start with 100.0 g on January 1st 2018, the amount…

Q: Krypton-81 has a half-life of 2.29 × 105 years. A 750-mg sample of Krypton-81 undergoes electron…

A: A question based on nuclear chemistry that is to be accomplished.

Q: Carbon-14 is used in radiocarbon dating. The half-life of carbon-14 is 5.73*10^3 years. How many…

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Q: The half-life of 98AU is 2.7 days. If you begin with 5.6 mg of this gold isotope, what mass remains…

A: Half-life is the time required for the reaction to be half completed. It is denoted by t1/2 . For a…

Q: The half-life of element X is 500 years. If there are initally 8g of X how much will remain after…

A: The half-life of an element is the time it takes for half mass of the element to decay.

Q: Radium has a half-life of 1600 years. How many years does it take for 90% of a given amount of…

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Q: If 1/8 of a radioactive element remains after 600 years, what is the element half life? Please…

A: The radioactive decays follow first order kinetics.  The half life of the element is defined as the…

Q: The half-life of cesium-137 is 30.2 y. How long will it take for a sample of cesium-137 to decay to…

A: Half life of caesium- 137=30.2 years a0=x a1/2=x/8

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.