Radioactive iodine-131, used in radiotherapy to treat cancer, has a first-order half life of 8.0 days. A sample of iodine-131 is injected directly into a tumor. How long will it take for 15% of the iodine-131 to remain in the tumor? First order: Ln{[A]0/[A]} = kt Half life = 0.693/k

Q: Polonium-209, an α� emitter, has a half-life of 102 years.How many α� particles are emitted in 2.0…

A: Mass = 1.8 ng Time = 2 s Half life = 102 years

Q: 2) The radioactive decay of 14C is a first order process with a half life of 5730 years. If the…

A:

Q: At an archaeological site, several well- preserved items made from wood were found. The carbon-14…

A: The objective of this question is to determine the age of the wooden items found at an…

Q: 1311, used to treat thyroid cancer, has a first order half-life of 6.99 × 105 s. How long does it…

A: Radioactive decay follows first-order kinetics. The decay constant (λ) and half-life of a substance…

Q: The rate constant for the decay of a radioactive isotope is 3.1x 103/day. What is the half-life of…

A: Given is a radioactive isotope with rate constant = 3.1×10–3/day . We need to find the half life of…

Q: The first-order rate constant for radioactive decay of 131^l is equal to 8.642 x 10-2 day-1. Find…

A: Given : first order reaction Tip: apply decay equation

Q: Tritium is radioactive and decays by a first order process with a half-life of 12.5 yr. If an…

A:

Q: Iodine-131 is a radioactive isotope that is used to diagnose and treat some forms of thyroid cancer.…

A: Q. Given k  = 0.138 d-1 ( rate constant of first order of radioactive decay )Here in this question…

Q: 140Ba decays via first-order kinetics (as do all radioactive isotopes) and has a half-life of 12.75…

A:

Q: The half-life of 32P is 14.3 days. You count a sample containing 32P and obtain 32,450 cpms. You add…

A: Radioactivity refers to spontaneous disintegration of a substance on itself. The radioactivity of a…

Q: A new element is discovered. It decomposes at rate = k[X]^3 If the half life is 4 hours and the…

A: Given If the half life is 4 hours and the concentration is 16 micromolar, what is the rate constant…

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

A: Half life (t1/2) :-  The time required for the concentration of reactant to reduce to half of its…

Q: Consider the radioisotope ⁹³Mo (half life = 4.00 × 10³ years). What is the first order rate constant…

A: For first order reaction:  Rate constant, K = 0.693/t1/2  t1/2 = Half-life

Q: The rate constant for the decay of a radioactive element is 2.44 x 10 ^-3 day^-1. What is the…

A:

Q: The first-order decay of thallium-201 is used to image heart muscle in patients with suspected heart…

A: The half-life of the thallium-201 is = 73 h The percent reactivity of the thallium-201 after 48 h is…

Q: Consider the radioisotope "Ca (half life = 1.03 × 105 years). What is the first order rate constant…

A: Rate constant is 6.73 x 10-6 yr-1

Q: If 40 mg of HCL is added to 600 mL of pure water, has a first order decay rate constant of 0.2/day,…

A: The first order reaction is the reaction in which the rate of reaction is directly proportional to…

Q: Technetium-99 is often used for assessing heart, liver, and lung damage because certain technetium…

A: As we know radioactive decay follows first order kinetics,  For a first order reaction relation…

Q: Americium-241 is used in smoke detectors. It has a first order rate constant for radioactive decay…

A: Radioactive decays follows first order rate constant.Half life of tye first order rate constant does…

Q: ) A human bone uncovered in a burial site in Majorca, Spain by a student working for the pollentia…

A: Given, Rate constant of decay of  of C-14, K=1.2094×10-4yr-1

Q: The radioactive nuclide 170Ta undergoes first-order decay with a half-life of 6.76 min. If a…

A:

Q: Molybdenum-99 decays to technetium-99. Technetium-99 is also radioactive but has a long half life…

A: The time elapsed (t) = 2 hours The half-life of technetium-99 (T) = 6 hours

Q: The half-life for the first order radioactive decay of 14C is 5730 years. An archeological sample…

A: The breaking down of atomic nuclei releases the energy and matter from nuclei. This process is named…

Q: cer, has a first order nail-life of 6.77 x 10 S. HOW used to treat thyroid long does it take for the…

A: Half life of first order reaction is independent of concentration

Q: Deoxyglucose labeled with 18F is commonly used in PET scan to locate tumors.  The half-life of 18F…

A: The decay of radio active substance follows first order kinetics. Time, t  taken for the level of…

Q: I was given the below function to describe the half life radioactive decay: N(t)=N0e-kt Where N(t)…

A: half-life(t1/2) of a radioactive decay is the time required to bring down the amount of radioactive…

Q: strontium-8 is a readioactive maker used in scanning for bone disease including cancer that decays…

A:

Q: Sodium pertechnetate (Tc-99m) is a radiopharmaceutical used as a diagnostic agent with a half-life…

A: Given  Half life ( t1/2) for the sodium pertechnetate i.e.    t1/2 = 6.01 hour The decay of sodium…

Q: Deoxyglucose labeled with 18F is commonly used in PET scan to locate tumors.  The half-life of 18F…

A: Radioactive decay is first order reaction.

Q: 3) Ba-141 has a half life of 18.26 minutes and decays by first order kinetics. How many half lives…

A:

Q: Americium-241 is used in smoke detectors. It has a first order rate constant for radioactive decay…

A:

Q: Two lakes are connected to each other as shown in the figure below. Each lake has a volume of 106 m³…

A: (i) To determine the steady-state concentrations in the effluent from the lakes, we'll need to set…

Q: Elements heavier than uranium in the periodic table do not exist in any appreciable amounts in…

A: Elements below uranium have short half lives yet they exist in nature whereas higher elements do…

Q: the half-life of fluorine 18 is 109.77 minutes how long will it take for a 6.250 % of the original…

A: The objective of this question is to determine the time it will take for only 6.250% of the original…

Q: A certain drug has a half-life in the body of 5.5 h. What should the interval between doses be, if…

A: First of all we calculate the rate constant by using half life of the Reaction. And then by help of…

Q: Consider the radioisotope ²³⁵U (half life = 7.04 × 10⁸ years). What is the first order rate constant…

A: The reaction is given first order. And half life = 7.04 X 108 years

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.