When an individual is confronted with a potentially harmful situation, the adrenal glands release epinephrine (adrenaline). Epinephrineprepares the body for action by increasing the heart rate and bloodglucose levels. Explain the advantages or disadvantages associatedwith a shorter half-life for epinephrine, such as when it is released asa neurotransmitter, and those associated with a longer half-life, suchas when it is secreted as a hormone.

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: Carbon-14 has a half-life of 5720 years and this is a first order reaction. If a piece of wood has…

A:

Q: Calculate the half-life (in minutes) for a radioactive substance which loses 42.5% of its original…

A: After 1 hour it loses 42.5% of its original intensity, which means after 1 hour 57.5% of the…

Q: Strontium-90 is one of the radioisotopes released in the Chernobyl nuclear plant accident. The…

A:

Q: a reactant decomposes with a half life of 143 s when its initial concentration is 0.328M. when the…

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Q: The radioisotope strontium-90 has a half-life of 38.1 years. If a sample contains 40 mg of Sr- 90,…

A:

Q: Will rate fast! The half-life for the radioactive decay of U-238 is 4.5 billion years and is…

A: The objective of the question is to A) Calculate the time taken for  of the decay.B) Calculate the…

Q: The rate at which a certain Australian tree cricket chirps is 187/min at 27°C, but only 40.2/min at…

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Q: The radioisotope 32Pdecays by 1st-order kinetics and has a half-life of 14.3 days. How long does it…

A: The answer is given as follows

Q: A sample of sodium-24 chloride contains 0.050 mg of Na-24. After 20.5 h, 0.019 mg of Na-24 is left.…

A: Sodium-24 is radioactive isotope of sodium-23  All radioactive reaction are first order reaction…

Q: The radioisotope phosphorus-32 is used in tracers for measuring phosphorus uptake by plants. The…

A: Radioactivity follows First order reaction.   For First order reaction : t1/2 = 0.693k where, t1/2 =…

Q: If the first-order half-life of tritium (³H) is 12.26 years, what amount of time is necessary for it…

A: Given data : half-life of tritium (³H) is 12.26 years Let the initial amount be x. Also given that,…

Q: half-life

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Q: The half-life of a chemical substance is 5 days. How long does it take for 1.3 Kilograms of the…

A: For first order  t = 1/K × { ln Co/Ct }

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

A:

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: The decay behavior of a radioactive substance obeys first order kinetics: In(N/N,) = -kt, where N is…

A: The decay of a radioactive substance follows first order kinetics and is given by:lnNN∘ = -ktwhere N…

Q: 1) The decomposition of N2O5 is an important process in the atmosphere. It is a first order…

A: Given=>  1) The decomposition of N2O5 is an important process in the atmosphere. It is a first…

Q: If the initial concentration of nitrous acid is 1.00 M and, after 17.8 s has elapsed, the…

A: Initial concentration of nitrous acid = 1.00M  Time elapsed = 17.8 sec Concentration after this time…

Q: Ibuprofen, a common over‑the‑counter analgesic, often comes in doses of 200.0 mg and is usually…

A:

Q: (4) Radioactive decay follows first order kinetics. How manyμgof a3.42μgsample ofCo−60remain after…

A: The question is based on the concept of chemical kinetics.   we need to calculate quantity of sample…

Q: The isotope Cesium 137, which has a half-life of 30 years, a product of nuclear power plants. How…

A: Here it is required to find the time needed for a radioactive isotope of cesium-137 to decay to…

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: The decay behavior of a radioactive substance obeys first order kinetics: In (N/N,) = -kt, where N…

A: Given: Half-life of radioactive nuclei = 10 min = 600 sec Initial amount = No Amount at time ‘t’ = N…

Q: Strontium-90 is one of the radioisotopes released in the Chernobyl nuclear plant accident. The…

A:

Q: In 2012 the skeleton of King Richard III of England was found under a parking lot in Leicester,…

A: Given,The half life of carbon-14 = 5730 yearsthe remaining amount of carbon-14 after 't' time =…

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: 9. True or False: The steady-state approximation is valid when the decay rate of the intermediates…

A: Steady state approximation is used to determine the rate laws of reactions in chemical kinetics.

Q: 146Pm decays via first-order kinetics (as do all radioactive isotopes) and has a half-life of 5.53…

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Q: What is the half-life for the first-order decay of carbon-14 if the rate constant for the decay is…

A: • The values provided in the question are:-     i) Decay constant of carbon-14 element, λ = 0.124…