What is a conjugate acid? Suppose a radioactive element has a half-life of 360 days. In the lab, some chemical modifications are done and in the modified element the value of the decay constant doubled (i.e. increased by two times). Compare the half-life of the normal and modified element.

Q: Find the initial amount of a radioactive element with a half-life of 21.7 hours, when the remaining…

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Q: Strontium-90 is a product of the Chernobyl reactor accident of 1986.  Strontium-90 has a half life…

A: Using half life , we will first calculate rate constant. Then calculate time required to reduce to…

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: a certain radioactive substance decays at a rate proportional to the amount present. If a quarter of…

A: quarter of a radioactive substance decayed after 35 hours

Q: 5. Carbon-11, used in medical imaging, has a half-life of 20.4 min. The carbon-11 nuclides are…

A: Answer: Relation between quantity of radioactive substance and n number of half lives is shown…

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: Tritium, which is , has a half-life of 12.3 years. Calculate the amount of time it would take for…

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Q: The isotope strontium-90 is produced during testing of nuclear weapons.  If 100.0 mg of strontium-90…

A: Given  Initial Amount of Sr - 90  (A)o = 100 mg  Half life time ( t1/2 )  =  29 years  Time ( t ) =…

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

A: Radioactive decay follows first order kinetics. Half life(t1/2) = 4.88 x 1010 years hu

Q: A scientist has a 1.2-g sample of pure strontium-91,  9138Sr. The half-life of strontium-91 is…

A: Given, mass of sample = 1.2 g half life , t1/2=9.70 h

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

A: Given,(i) initial amount of radio isotope X = 16.00 gHalf-life = 4.0 hTime taken for decay = 12.0…

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: 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: After 24.0 days, 2.00 milligrams of an original 128.0 milligram sample remain. What is the half-…

A: The given values are: N0=128 mg Nt=2 mg time taken (t)=24 d Here, N0 is initial amount. Nt is left…

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: You Answered A sample of Cu has an original mass of 57.3 mg, and after 24.0 hours the sample mass is…

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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.