The substance decomposed at a rate proportional to the amount present. What is the half-life of the substance if 90% decomposes in 100 years?   657.88 years   567.87 years   465.34 years   596.36 years

Q: The Hydrogen isotope, tritium, is radioactive and has a half-life of 12.5 years. What percentage of…

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Q: Scientists working in Lake Istokpoga calculating half-lives of pollutants called volatile organic…

A: The half life (t1/2) of zero order reaction is given by the formula  t1/2 = [R]o / 2K [R]o = Initial…

Q: Two gases X and Y are found in the atmosphere in only trace amounts because they decompose quickly.…

A: Given, held life of X is 1.5 h and y is 135 min  Partial pressure of X is 75% greater than Y

Q: Two gases X and Y are found in the atmosphere in only trace amounts because they decompose quickly.…

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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: Consider the radioisotope ²²⁶Ra (half life = 1.60 × 10³ years). What is the first order rate…

A: Using the formulas of first order kinetics we can solve this problem.

Q: Radioactive decay is a first order process. If the half-life of 222Rn is 3.8 days, approximately how…

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Q: The half-life of the radioactive isotope phosphorus-32 is 14.3 days. How many days does it take for…

A: The equation for 1st order decay is:

Q: Two gases X and Y are found in the atmosphere in only trace amounts because they decompose quickly.…

A: The half-life of a reaction is the time taken for the reactant to reduce to half its initial value…

Q: The half-life of the radioactive element plutonium-239 is 25,000 years. If 16 grams of plutonium-239…

A: Rate of a reaction determines the speed with which a reaction proceeds. First order reaction is a…

Q: Two gases X and Y are found in the atmosphere in only trace amounts because they decompose quickly.…

A: Half-life of X = 15 minHalf-life of Y = 1.00 h = 60 minThe partial pressure of X is 2 times greater…

Q: Two gases X and Y are found in the atmosphere in only trace amounts because they decompose quickly.…

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Q: What mass of radioactive radium-226 has been lost from an original sample of 20.0 g of radium-226…

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Q: Two gases X and Y are found in the atmosphere in only trace amounts because they decompose quickly.…

A: Half-life of X = 0.50 hHalf-life of Y = 45 minLet the initial partial pressure of X be and the…

Q: The radioactive isotope copper-64 (64CU) is used in the form of copper(II) acetate to study Wilson's…

A: Answer: the half life of radioactive isotope c64u is used in the form of copper(II) acetate  is 12.7…

Q: Be sure to answer all parts. Archaeologists can determine the age of artifacts made of wood or bone…

A: The rate constant (k) of the given first-order process is calculated using equation (1) in which…

Q: the half-life of the antidepressant Prozac in an average man is 2 days. how long in days does it…

A: The half-life of the antidepressant Prozac in an average man is = 2 day The time required for the 95…

Q: half-life

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Q: Two gases X and Y are found in the atmosphere in only trace amounts because they decompose quickly.…

A: Given:Half-life of X = 105 minHalf-life of Y = 1.25 hrThe partial pressure of X is 5 times greater…

Q: Radioactive gold-198 is used in the diagnosis of liver problems. The half- life of this isotope is…

A: First using given value determine the rate constant, k value. t1/2=2.7…

Q: 9. A sample of a compound is found to have a half-life of 14.65 seconds. Answer the following…

A: This question is related to chemical kinetics.  A first-order reaction is a chemical reaction in…

Q: Two gases X and Y are found in the atmosphere in only trace amounts because they decompose quickly.…

A: Yes, The gases are being decomposed, so their partial pressure is decreasing. The partial pressure…

Q: What is the first order rate constant for ²⁴⁰Pu?

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Q: 3. One of the radioactive nuclides formed in nuclear power plants is hydrogen-3, called tritium,…

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Q: ? Two gases X and Y are found in the atmosphere in only trace amounts because they decompose…

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Q: Radioactive gold-198 is used in the diagnosis of liver problems. The half-life of the isotope is 2.7…

A:

Q: Radioactive gold 198 is used in the diagnosis of liver problems. The half-life of the isotope is…

A:

Q: Radioactive gold-198 is used in the diagnosis of liver problems. The half-life of this isotope is…

A:

Q: Two gases .I' and I are found in the atmosphere in only trace amounts because they decompose…

A: Solutions  A)  yes B)  4.7 hours

Q: A substance decomposes with a rate constant of 9.05 × 10⁻⁴ s⁻¹. How long does it take for 23.0% of…

A: We have to find time for 23% decomposition

Q: Two gases X and Y are found in the atmosphere in only trace amounts because they decompose quickly.…

A: As both the gas decomposes, the partial pressure also decreases. The reason is the partial pressure…

Q: Uranium-238 decays to form thorium-234 with a half-life of 4.5x109 years. What is the decay constant…

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Q: The isotope strontium-90 is one of the extremely hazardous species in the residues from nuclear…

A: First order reaction- the reaction whose rate is depends on only single reaction whose concentration…

Q: The half-life of the radioactive isotope phosphorus-32 is 14.3 days how many days required to…

A: We have given that  t1/2 = 14.3 days  And the radioactive phosphorus-32  undergo 75%  decay

Q: Two gases X and Y are found in the atmosphere in only trace amounts because they decompose quickly.…

A: Answer:Here:

Q: substance decomposes with a rate constant of 9.05 × 10⁻⁴ s⁻¹. How long does it take for 24.5% of the…

A: Using basics of first order of reaction to calculate the time required.