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: The half-life of radium-226 is 1.60X10³ yr. How manyhours will it take for a 2.50-g sample to decay…

A: Given :  t1/2 = 1.60 x 103 yr , [A0] = 2.50 g , [At] = 0.185 g Half-life : The time taken by any…

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: 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…

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

A:

Q: The half-life of a radioactive isotope is 13 seconds. How long does it take for 100 mg of the…

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 isotope 166-Yb decays by electron capture with a half-life of 57 hrs. What percentage of the…

A: We have to calculate the percentage of isotope left

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: If 18.9% of a sample of zinc-65 decays in 73.5 d, what is the half-life of this isotope (in days)?

A:

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: 2. The isotope cesium-137 has a half-life of 29.75 years. How long will it take a 100 gram sample of…

A: First-order reaction: The type of reaction which depends only on one substance is called a…

Q: If a tree dies and the trunk remains undisturbed for 1.895 × 10ª years, what percentage of the…

A: Mass% is equal to the ratio of the mass of the given substance to the total mass of the substance.…

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: The half-life of iron-59 is 44.5 days. How much of a 3.00-mg sample will remain after 222.5 days?

A:

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

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: Phosphorus-32 is a commonly used radioactive nuclide in biochemical research, particularly in…

A: Answer: Given data: t1/2=14.3dayst=33.0days Mass of sample m=188mg

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

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: 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: Ca-60 is used extensively in radiotherapy, its half-life is 5.27 years. How many years will it take…

A: The given data is as follows: The half life Co-60 = 5.27 years The initial amount A∘= 100 The left…

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

A:

Photochemistry

Photochemistry is the part of chemistry that studies the various mechanisms of reactions that are triggered by the presence of light energy. It also helps to study the changes involved in a molecule that can undergo the absorption of radiation.