3. The half-life of 3P is t1/2 = 14.30 days. Suppose that mass of P is 32.00 amu. (a) Calculate the mass of 2P in 175.0-mg sample of Na35PO4 (b) How long does it take for the amount of 32P to decrease to 2.713 mg in this sample?

Q: It takes 4 h 39 min for a 2.00-mg sample of radium-230 to decay to 0.25 mg. What is the half-life of…

A: Half life of first order kinetic reaction is given by:

Q: Gallium-67 is used medically in tumor-seeking agents. What is the half-life of gallium-67 if 229…

A: Time = 229 hours  Reduced activity = 13.2 %  Half life time of gallium - 67 = ?

Q: Iodine-131 is used in the diagnosis and treatment of thy- roid disease and has a half-life of 8.1…

A: Given data: The half-life of iodine-131 = 8.1 days The initial amount of the sample= 10 μg

Q: Gadolium-153, which is used to detect osteoporosis, has a half life of 242 days. What percentage of…

A: Radioactive decay follows first order kinetics.Equation for half life, t½ = ln2 / kTherefore k = ln2…

Q: 5. The half life of radioactive 32P is 14.3 days. How long does it take for 100 mg of this isotope…

A:

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: The 14C in a bone has a disintegration rate of 4000 dis h1. The half life of 14C is 5730 years.…

A: The rate of disintegration is proportional to the number of atoms left after a time (N) as- Where…

Q: What was the original mass of a sample if 0.0750 grams remain after 11.47 days?

A: Given, The half life of Rn-222 is 3.823days.   0.0750 grams remain after 11.47 days  The original…

Q: Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET).…

A:

Q: Determine the half life of an isotope hat decays from 450.0g to 320.0g in 50 years.

A:

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. How…

A:

Q: The isotope 208Tl undergoes β decay with a half-life of 3.1 min.(a) What isotope is produced by the…

A: isotope is produced by the decay has to be determined The time taken for 99.0% of a sample of pure…

Q: The half-life of Uranium is 235 (U235) decaying to lead 207 (Pb 207) is 704 million years suppose an…

A:

Q: The isotope 83212Bi has a half-life of 1.01 years. What mass (in mg) of a 2.00-mg sample will not…

A:

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: Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET).…

A: The half-life (t1/2) of Nitrogen-13 is provided as 10 minutes.

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: Radioactive tungsten-178 decays with a half-life of 21.6 days. (a) What is the value of k in s-12…

A: Given: The half-life of tungsten-178, t1/2 = 21.6 days Seconds in a day are given as: 1 day =…

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium- 67 is 78.2 hours.…

A: Given   The half-life is 78.2 hours. The fall in activity of gallium-67 is 29.1 percent of its…

Q: The half-life of 90Sr is 28.8 years. How long will it take (in years) for a 86.1 mg sample of 20Sr…

A: Given t= 28.8 years. t1/2 = ?

Q: A sample of (_16^35) , a ß- emitter, has an activity of 0.100 µCi. In 20.0 days, the activity of the…

A: Given data, [A] = 0.0853 μCi[A0] = 0.100  μCit = 20 days Calculating the half-life of a sample.

Q: The half-life for the process 238U ¡ 206Pb is 4.5 * 109 yr. A mineral sample contains 75.0 mg of…

A: Calculation of rate constant, k: k=0.693t1/2=0.6934.5×109 yr=1.54×10-10 yr-1

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

A:

Q: One of the radioactive isotopes used in medical treatment or analysis is iodine-131. The half-life…

A: The relationship between the decay constant and the half-life period is given below.

Q: The half-life of nucleus Rn-222 is 3.88 days. How many mg of a 5000 mg sample of Rn-222 remains…

A: Given, half-life of nucleus is 3.88 days.  The half-life can be calculated by the expression given…

Q: The isotope 90/38 Sr is one of the extremely hazardous species in the residues from nuclear power…

A:

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

A:

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

A:

Q: What is the half-life of an isotope that decays to 6.25% of its original activity in 68.3h?

A: Radioactive decay is a first order reaction. For a first order reaction, rate constant can be…

Q: The half-life of Palladium-100 is 4 days. After 24 days a sample of Palladium-100 has been reduced…

A: N  = N0 e-λt  N0  = Initial mass of the sample N = Mass of the sample after a time 't' λ = decay…

Q: The half life of 123I is 13 hr.  How much of a 64 mg sample of 123I is left after 26 hours?

A: Given,Half life of 123I is 13 hr

Q: The half-life of radiogold is approximately 3 days. If 1.5 g of this has been administered to a…

A:

Q: A 1.00 L sample of water near a nuclear plant registered a 2.55 pCi of iodine–131. What is the…

A: The given data contains, half life =8 days. =8 days×24 hourday×60 minhour×60 shour =681200 s mass of…

Q: The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced…

A: The initial mass of the sample of palladium-100, No, in mg is calculated as shown below where t1/2…

Q: Gallium-67 is used medically in tumor-seeking agents. What is the half-life of gallium-67 if 219…

A:

Q: Radioactive tungsten-178 decays with a half-life of 21.6 days. (a) What is the value of k in s"17…

A: Answer-a Relation between half life and decay constant is: λ=0.693t1/2 value of half life given is…

Q: A sample of 16? 35 , a ß-emitter, has an activity of 0.100 μCi. In 20.0 days, the activity of…

A: Radioactive follows first order kinetics, If λ is the disintegration constant, t is time at which…

Q: Sr is an inotope produced from atmosphenic testing of nuclear bombs. If naclear testing was stopped…

A:

Q: A 53.8-mg sample of sodium perchlorate contains radioactivechlorine-36 (whose atomic mass is 36.0…

A: The number of disintegration of a radioactive compound can be determined by the number of…

Q: 1) Co-60 is used extensively in radiotheraphy as a source of y- rays. Its half life is 5.27 years.…

A: a) Given: Its half-life is 5.27 years. The number of years does Co-60 to decrease to 35 % of its…

Q: Iodine-131 is used in the diagnosis and treatment of thyroid disease and has a half-life of 8.0…

A: Formula: Since Iodine is a radioactive substance, it follows the 1st order rate law. The half-life…

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

A:

Q: A 120-mgmg sample of technetium-99 mm is used for a diagnostic test. If technetium-99 mm has a…

A: Solution -

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. How…

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

Q: Some watch dials are coated with a phosphor, like ZnS,and a polymer in which some of the 1H atoms…

A: Given that : Half life of tritium = 12.3 yr Time period (t) = 50 yr Mass of tritium = 3.024 g

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

A: