Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The half-life of iodine-131 is 8.04 days. If you begin with 45.4 mg of this isotope, what mass remains after 21.0 đays have passed? mg

Q: Phosphorus-32 is a radioisotope used in the treatment of leukemia and pancreatic cancer. If the…

A: Given, Phosphorus-32 in a sample decreases from 1.2g to 0.30g in 28 days . We have to calculate half…

Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A:

Q: If you have 1 gm of pure potassium 40 (40K) that is experimentally determined to emit about 105 beta…

A: Activity of 40 K = 105 beta rays. The decay constant λ can be calculated as follows:

Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A: To solve this problem first we find the rate constant ( k) using half life time . Then we will…

Q: The fraction of a radioactive isotope remaining at time t is (1/2)t/t1/2 where t1/2 is the…

A: Decay reactions are first order reactions. Since we know that the relationship between the amount of…

Q: The half-life of a certain radioactive isotope is 20 days. How long does it take for 50g of the…

A:

Q: 6. Iodine – 131 is used in the form of sodium iodide to treat cancer of the thyroid. The isotope has…

A: half - life = t1/2 = ln 2λ Given that,t1/2 = 8.04 days Ao = 25 mg t = 32.2 days

Q: Tellurium-123 is a radioactive isotope occurring in natural tellurium. The decay constant is 1.7 x…

A: Radioactivity is a special property of some elements or substances by which they continuously…

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

A:

Q: Radioactive calcium-47 decays with a half-life of 4.5 days. A chemist obtains a fresh sample of…

A: Half life of sample T = 4.5 days Final radioactivity A' = (100-25) % of A = 75 % of A.  A is initial…

Q: gold -198 is used in the diagnosis of liver problems. the half-life of 198au is 2.69 days. if you…

A: Calculating the rate constant for first order reaction using half-life: t1/2=0.693k     .....(1)…

Q: The half life of an isotope is 43 seconds.how long does it take 100.00 g of isotope to decay to 6.25…

A: Given data contains, Half-life of an isotope is 43 seconds. Mass of isotope before decay is 100.0 g.…

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

A:

Q: Americium-241 is widely used in smoke detectors. The radiation released by this element ionizes…

A: The activity for the sample can be described as the amount of the radioactive particles are…

Q: what mass remains after 28.5 days have passed?

A:

Q: Chromium-51 is a radioisotope that is used to assess the lifetime of red blood cells The half-life…

A:

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

A:

Q: " Ca is used in the study of bone formation. The half-life of Ca is 4.54 days. If you begin with…

A:

Q: 7. If uranium-238 has a half-life of 45 billion years, how many years would it take for a 10-gram…

A: The half-life is the time required to reduce one half of the initial concentration of the substance.

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

A:

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

A:

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

A: Decay reactions are first order reactions. Since we know that, for different order of reactions, the…

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

A: Half-life of Cs-137 and initial mass, from which amount of Cs-137 left after 90.6 years.

Q: he half-life of 14/6 C is 5730 years. If a mummy wrapping contains about 1/2 as much 14/6 C as…

A:

Q: The half-life of radioactive chromium-51 is 28 days. If a sample of chromium-51 has a mass of 12.0…

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

A: Gallium - 67 has a half-life of 78.2 hours. Initially 36.7 mg of Gallium - 67 were present.   Here,…

Q: A nuclear power plant emits into the atmosphere a very small amount of krypton-85, a radioactive…

A: Given: Half life (t1/2) = 10.76 years  Total time (T) = 25 years

Q: Q1 A sample of leather is analyzed by carbon-14 dating. The concentration of 14C in this sample is…

A:

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

A: Radioactive decay reactions are first order reactions. The calculation can be done using first order…

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

A: Given: Mass of Na332PO4 = 175 mg = 0.175 g                                       (Since 1 g = 1000…

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

A:

Q: 1. Gold-198 is used in the diagnose of liver problems. The half-life of Au is 2.69 day. If you begin…

A: Given data: half life of 198Au = 2.69 day Initial concentration of  198Au is 2.8 μg Time = 10.8 day

Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A: The half life of radon = 3.82 days. Initial amount = 37.9 mg  time = 4.70 days mass remains after…

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

A:

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

A: Given, The half-life of the tritium is t1/2=12.3 yr. Time t is 50 yr. The rate constant can be…

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

A:

Q: 1) P-32 has a half-life of 14.3 days. How many milligrams of phosphorus-32 remain after 57.2 days if…

A: Half-life = 14.3days Initial mass = 4.0mg You will be left with half of initial mass after 14.3 days…

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: Iodine-131 is often used in nuclear medicine to obtain images of the thyroid  If you start with…

A: Half-life is the time required for a quantity to reduce to half of its initial value. we represent…

Q: Iodine-131 is a radioactive isotope. After 2.00 days, 84.2% of a sample of 13I remains. What is the…

A: Iodine- 131 is an radioactive isotope. Time = 2 days Final concentration of 131l  = 84.2% of sample…

Q: Americium-241 is widely used in smoke detectors. The radiation released by this element ionizes…

A:

Q: 18° Re is used in the treatment of bone cancer. The half-life of 18° Re is 3.72 days. If you begin…

A: Half life time = 3.72 days Initial amount = 1.93 ug  Time = 18.6 days  Mass remains after 18.6 days…

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

A: Here given, The half-life of gallium-67 (t1/2) = 78.2 hours Time (t) = 198 hours Initial amount (N0)…

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.