a sampe of sodium-24 with an activity of 12 mCi is used to study the rate of blood flow in the circulatory system. if sodiun-24 has a half-life of 15h, what is the activity the following intervals. a. one half-life b.30 h

Q: a. A 100.0 nanogram (ng) sample of sodium-24 was stored in a lead-lined cabinet for 2.5 d. How…

A:

Q: A 6.2 mg sample of 90Sr (half-life 29.12 y) is in secular equilibrium with its daughter 90Y…

A: a) At equilibrium        λsrNsr = λyNy              Nsr = λyNyλsr                     = 29.12y365…

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Q: The half-life of strontium-90 is 28 years. H

A: Given t1/2 of a reaction is 28 years  decay constant  (λ) λ = 0.693t1/2     = 0.69328 y     =…

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A: As radioactive decay is a first-order process and can be described in terms of either the…

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A: Answer - Nuclear reaction -  a nuclear reaction is semantically considered to be the process in…

Q: 7. If we start with 1.000 g of strontium-90, 0.953 g will remain after 2 years. (a) What is the…

A: Reladioactive decay reactions are first order reactions which can be solved as follows using…

Q: What is the half-life of an isotope that decays to 25% of its original activity in 17.8 h?…

A: Given:- Let initial activity of an isotope=No Activity of isotope decayed in 17.8 h= x = 25% of No…

Q: Na-24 with a half life of 15h is used to study blood circulation.if a patient is injected with a…

A: GIVEN : t1/2= 15h  N0=  2.5x109d/s  t = 4 days  λ = 24 / 15 = 8 / 5

Q: 3.8. The half-life of 109Tc, a ß- emitter, is 15.8 s. a). How many atoms of 10Tc are present in a…

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Q: 3. The half-life of 3P is t1/2 = 14.30 days. Suppose that mass of P is 32.00 amu. (a) Calculate the…

A: Radioactive decay is an example of first order reaction. In radioactive decay, the loss of energy…

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A: The rate constant  for half life of 60 days is calculated as,

Q: 45. The half-life of l®F is 109.7 minutes. If radiolabeled Prozac were administered to a patient for…

A: In order to find the time taken by the radiocative sample to reach 10% of its original activity we…

Q: Technetium-99m is used in diagnostic imaging studies involvingthe brain. What fraction of the…

A: Law of Radioactive decay states that the rate of disintegration of a radioactive substance at any…

Q: 15.0 mCi of Tc-99 is required for users to scan a patient brain at a hospital. A freshly prepared…

A: Given: Activity of isotope required for treatment = 15.0 mCi. The initial activity of the isotope =…

Q: The half-life of molybdenum-99 is 67 h. A 200 microgram (mg)quantity decays, over time, to 25 mg.…

A: Solution :      The half-life of a reaction is defined as the time required to reduce the…

Q: Sodium-24 is used to treat leukemia and has a half-life of 15 hours. A patient was injected with a…

A: Radioactive disintegration  is very unstable nucleus loosing energy  and it follows first order

Q: The half-life of 19TC, a ߯ emitter, is 15.8 s. 43 (a) How many atoms of 13Tc are present in a…

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Q: What is the half‑life of an isotope that decays to 6.25%6.25% of its original activity in 24.2…

A: The half-life  is the time it takes for the concentration of that substance to fall to half of its…

Q: Potassium-42 is used to locate brain tumors. Its half-life is 12.5 hours. Starting with 15.4 mg,…

A: Given, half life of K-42 = 12.5 hr Initial amount of K-42 = 15.4 mg    To know what fraction will…

Q: 1. Sodium-24 is a diagnostic radioisotope used to measure blood circulation time. How much of 20.0…

A:

Q: What is the specific activity (in Ci/g) if 1.65 mg of anisotope emits 1.56X10⁶ α particles per…

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Q: What is the binding energy in kJ/mol Ga for gallium-71? kJ/mol 31 H+ 40,n Ga The required masses…

A: Given-> Masses -> 1H1 = 1.00783 g/mole 0n1= 1.00867 g/mole 31Ga71= 70.92490 g/mole

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Q: 1.What is the half-life of 99Tc if a 500.0 g sample decays to 62.5 g in 639,000 years 2)How much of…

A: Given,Mass 500 g,Therefore, the first half-life is 250.0g.Second half-life is 125.0g.Third half-life…

Q: A sample of sodium-24 with an activity of 12 mCi is used to study the rate of blood flow in the…

A:

Q: Cobalt-60 is used extensively in medicine as a source of g-rays. Its half-life is 5.27 years. How…

A: Given Half life ( t1/2 )   = 5.27 year  Initial Activity ( A0 )  = 100 %  Remaining amount ( At ) =…

Q: What is the half-life of iodine-123 if 37.7 hours are required for the activity of a sample of…

A: Radioactive decays follow first order kinetics.

Q: A 85.0-mg supply of iodine-131, used in hospitals in the treatment of hyperthyroidism, was stored…

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Q: How old in years is a bottle of a solution if the deuterium 2H content is 67% that of a new wine?…

A: Radioactive decay follow first order kinectics    Half life = 100 years

Q: A sample of sodium-24 with an activity of 12 mCi is used to study the rate of blood flow in the…

A: Given:Half-life = 15hInitial amount [A]o = 12 mCi.

Q: 5.32 A sample of sodium-24 with an activity of 12 mCi is used to study the rate of blood flow in the…

A: Initial activity of sodium-24 = 12 mCi Half-life of sodium-24 = 15 h   The question requires to…

Q: iron-59 is a radioisotope that is used to evaluate bone marrow function. The half- ife of iron-59 is…

A:

Q: What is the age (in y) of mummified primate skin that contains 7.29% of the original quantity of…

A: Given: Half-life of 14-C = 5715 years The amount of 14-C at time t = 7.29% Original quantity The…

Q: 10.6. A sample of S, a ß- emitter, has an activity of 0.100 µCi. In 20.0 days, the activity o the…

A: Given,  Initial amount, [A]0 = 0.1 µCi  Final amount, [A] = 0.0853 µCi  Time, t = 20 days

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

A:

Q: What percentage of Technituum-99m would remain in your body 24 hours after injection with this…

A: Given,

Q: 15) What is the decay constant for 1311 if the half-life is 8.04 d? A) 9.31 x 10-5 s-1 B) 4.81 x…

A: Radioactive decay is a first order reaction and for a first order reaction,half-life can be…

Q: The half-life of stroncium-90 is 28 years. How long will it take a 50-mg sample to decay to a mass…

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Q: he half-life of chromium-51 is 28 days. If the sample contained 510 grams, how much chromium would…

A: Given that

Q: 8.0mg of a radioisotope of half-life 30 minutes is used for 12 minutes. What is the amount of the…

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Q: A 228-mL sample of an aqueous solution contains 2.35% MgCl2by mass. Exactly half of the magnesium…

A: Given: Volume = 228 mL Mass of MgCl2 = 2.35% Half-life of Mg-28= 21 hours= 21*60*60=75600 s density…

Q: A clinical technician finds that the activity of a sodium-24 sample is 96 cpm. What will be the…

A: The decay reactions are first order reactions. Since we know that the relationship between the…

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

Q: What is the binding energy in kJ/mol Br for bromine-81? kJ/mol 35;H+ 46;n→ The required masses…

A: The binding energy can be calculated as follows

Q: A sample of sodium-24 with an activity of 12 millicuries (mCi) is used to study the rate of blood…

A: Radioactive reactions are first order reaction. Initial activity of Sodium-24, No = 12 mCi Half life…