Calculate the energy release,q Initial mass- 196.08g Final mass- 195.08g Initial temperature- 22.5 Final temperature- 42.5 Water- 4.18J/g

Q: Uranium-238, 238U, has a half-life of 4.51 x 109 years. How long will it take for 1.0 g of 238U to…

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Q: the half life of oxygen-15 is 2 minutes. what fraction of a sample of O-15 will remain after 5…

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Q: The radioactive decay of a sample containing an unknown radioactive isotope produced 6274…

A: Given Initial disintegration = 6274 Final disintegration = 1898 Time = 15.31 days

Q: a. Two or more nuclei combine to form one larger nucleus in the process of nuclear_ i) fission, ii)…

A: We need to fill answers for the given short questions.

Q: The amount of radio active material present at time t is given by A=Aoekt, where Ao is the initial…

A: For a first order reaction, the rate of reaction is proportional to the first power of concentration…

Q: U-238 decays with the half-life of 4.47 billion years. Calculate the % of a sample left after 13.4B…

A: Given : Half life = 4.47 billion years  Time = 13.4 billion years.

Q: One of the radioactive isotopes used in medical treatment or analysis is iron-59. The half-life of…

A: Radioactive decay obeys first order decay kinetics   At=Aoe0.693t12×twhereAt= final activityAo=…

Q: F +ONa 19 23 11

A: In order to write an equation for a nuclear reaction ,we must first remember some basic rules. The…

Q: A piece of literature has announced that Uranium 238( 23822U) has a binding energy of approximately…

A: We can theoretically calculate the mass of a neutron. But this will be different from the…

Q: nuclear fusion

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Q: Researchers have attempted to combine the nuclei of multiple atoms to generate large amounts of…

A: For the 1st question  Answer - Option showing Fusion  is correct

Q: How many gallons of octane, C3H18. having a density of 0.703 g/cm?, would have to be burned to…

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Q: What is the optimum temperature for D-D fusion reaction and is there a way to work it out?

A: Given What is the optimum temperature for D-D fusion reaction and is there a way to work it out?

Q: The half-life of carbon-14 is about 5715 years. A sample contains 1 gram of carbon-14. How much will…

A: Formula for half life,  N (t )= No(1/2)t/t1/2 where, N (t) = quantity of the substance remaining…

Q: Cesium-137 is part of the nuclear waste produced by uranium-235 fission. The half-life of cesium-137…

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Q: A sample of Uranium-234 has been decomposing. If the original mass of 234U is 2.57milligrams, how…

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Q: Strontium-90 is a radioactive substance that decays according to following function, where y sub-0…

A: Here we are required to find the half life of the radioactive substance Sr90

Q: A rock contains 0.257 mg of lead-206 for every milligram of uranium-238. The half-life for the decay…

A: The first-order rate law can be transformed into another highly useful equation with the decay…

Q: c) What percentage of the isotope will remain after 115 days lfur 25. alpha beta and

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Q: If we start with 1.000 g of strontium-90, 0.953 g will remain after 2.00 yr. (a) What is the…

A: As we know, that Radio active decay follows first order kinetics. Rate constant for first order…

Q: An analytical laboratory balance typically measures mass to the nearest 0.1 mg. What energy change…

A: Given : Loss of mass = 0.1 mg  Since 1 Kg = 1000 g  And 1 g = 1000 mg => 1 Kg = 106 mg Hence mass…

Q: The half-life of oxygen-15 is 124 ss. If a sample of oxygen-15 has an activity of 4800 BqBq, how…

A: Half-life of a reaction is the time at which the initial concentration of the reactant becomes half.…

Q: In part of the decay series of radium-226, polonium-218 decays to lead-214, which then decays to…

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Q: It takes 870.98 years for carbon-14 to decay to 90 mg. What is the half life of carbon-14?

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Q: A sample initially contains 60.0g of thorium-234. After 48 days 7.8g of thorium-234 remains…

A: The half lifetime t12of a radioactive compound is the time when it disintegrates to its half of the…

Q: Naturally occurring uranium is composed mostly of 238U and 235U, with relative abundances of 99.28%…

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Q: 2 mol of beryllium-8 nuclei combine to form 1 mol of oxygen-16. The mass decrease is 0.0157 g.…

A: Solution Nuclear reactions, like chemical reactions, ar in the middle of changes in energy. The…

Q: The​ half-life of​ silicon-32 is 710 years. If 20 grams is present​ now, how much will be present…

A: Radioactive decay is always a first order reaction. The rate equation for the radioactive decay is :…

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: 2 mol of beryllium-8 nuclei combines to form 1 mol of oxygen-16. The mass decrease is 0.0157 g.…

A: E = ∆m x c2 Where, E = energy in J; ∆m = mass decrease in kg and c = velocity of light

Q: The energy produced by stars is from.. fusion of hydrogen fusion of helium fission of uranium none…

A: Sun provides the energy to earth due to a nuclear reaction. This reaction provides an enormous…

Q: The half-life of tritium is 12.4 years. How long will it take for 15% of a sample of tritium to…

A: The radioactive decays are first order reaction.

Q: If a rock sample was found to contain 4.30 x 10-7 mol of argon-40, how much potassium-40 would also…

A: Nuclear disintegration follows first order kinetics  λ=2.303 log(A0/A)/t  λ=0.693/t1/2 or 0.693/t1/2…

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

A: Given,half-life = 2 minutesNeed to find out the fraction remaining after five half-lives.

Q: Naturally occurring uranium is composed mostly of 238U and 235U, with relative abundances of 99.28%…

A: Given, relative abundance : U238=99.28 % U235=0.72% Half life : t1/2 of U238=4.5×109 yr t1/2 of…

Q: unknown sample contains radioactive element U-235. If the original amount present is 3500 atoms, how…

A: Given- Number of initial atom =3500 atoms Number of final atom =125 atoms  Half life =700 million…

Q: A sample of radioactive radon-222 was found to have a half life of 3.823 days.  What fraction of…

A: All natural and artificial radio active decays follows first order kinetics  The integrated rate…

Q: If 25%(1/4)of a radioactive element remains after1,000years, what is the half-life?

A: Radioactive elements are those elements whose nuclei are highly unstable and hence undergo…

Q: avier is at NASA analyzing Moon rocks. In one of the rocks from the lunar maria, he discovered 79 %…

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Q: How much of a 0.15 g sample of U-238 after the passage of 3200 years? Half-life is 4.01x10^9 years.

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Q: After 4.00 years a 2.0 g sample of a radioisotope remains from a sample that had an original mass of…

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Q: Naturally occurring uranium is composed mostly of 238U and 235U, with relative abundances of 99.28%…

A: Decay constant for 238U can be calculated as: λ=0.693t12=0.6934.5×109years-1 Decay constant for 235…

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: What is the half-life of magnesium-20 if 1.24 seconds are required for the activity of a sample of…

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Q: A volcanic eruption melts a large chunk of rock, and all gases are expelled. After cooling, argon-40…

A: Half-life of potassium-40 = 1.25 x 109 year A = The final amount of 40 K left = 1.38 mmol  A0 =…

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