The estimated half life for P—O bonds Is 1.3 x 10^5 a ( 1 a is the SI unit 1 annum for 1 year). Approximately 10^9 such bonds are present in a strand of DNA. How long would a single strand of DNA survive with no cleave in a absence of repair enzymes.

Q: A possible reaction for the degradation of the pesticide DDT to a less harmful compound was…

A:

Q: The first-order radioactive decay of iodine-131 exhibits a rate constant of 0.138 d−1. What is the…

A: Like chemical reactions, nuclear reactions are type of chemical reaction only but here in place of…

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

A: Half-life of americium-241 is 432.2 years Therefore, time = 3×432.2 years = 1296.7 years

Q: A substance undergoes first-order decomposition. After 45 min at 500°C, only 12.5% of the original…

A: A substance undergoes first order reaction.  Time = 45 min  Temperature = 500 °C  Original sample…

Q: The half-life for the radioactive decay of C-14 is 5730 years and is independent of the initial…

A: Rate constant is calculated using given half-life value:

Q: 6) Radioactive substances decay by first-order kinetics. How many years would be required for a…

A: By using the formula for First order kinetics we can solve this problem.

Q: The half-life for the radioactive decay of C-14 is 5730 years and is independent of initial…

A:

Q: The Arrhenius parameters for the gas-phase decomposition of cyclobutane, C4H8(g) → 2 C2H4(g), are A…

A: Concept introduction: Arrhenius equation: Half life: It is the time required to complete the…

Q: What is the half-life for the first-order decay of carbon-14? (146C⟶147N+e−)(614C⟶714N+e−) The rate…

A: Rate constant for the decay (k) = 1.21×10-4 year-1

Q: Radioactive decay is a process that follows first-order kinetics. The half-life of 41Ar is 0.01256…

A: First order reaction is a reaction in which the rate of reaction is directly proportional to the…

Q: A possible reaction for the degradation of the pesticide DDT to a less harmful compound was…

A: The given rate constant (k)= 2.55×10^-8 s^-1  Given reaction is first order  And we know for first…

Q: Match the half-life to the rate constant assuming that the initial conce k = 0.5 M/s k = 0.5/ (M s)…

A: A) k = 0.5 M/s From the unit of rate constant, it is zero order reaction.  half life = Ao/2k   =…

Q: A substance undergoes first-order decomposition. After 28 min at 500°C, only 12.5% of the original…

A:

Q: A substance undergoes first-order decomposition. After 36 min at 500°C, only 12.5% of the original…

A: When a substance remains only 50℅ in a period, that period is known as the half-life of that…

Q: Iodine-131 is used to treat tumors in the thyroid. Its first order half life is 8.1 days. If a…

A: Decay of I-131follow 1st order kinetics λ (decay constant) = 0.693/t1/2 = 0.693 / 8.1 days = 8.56…

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: 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: possible reaction for the degradation of the pesticide DDT to a less harmful compound was simulated…

A: For first order reaction : Half-life time, t1/2 = 0.693/k k = rate constant

Q: The decomposition of ethane, C2H6, to methyl radicals has a rate constant of 5.36 x 104 per second…

A:

Q: 5. The reaction 2NO(g) + Cl2(g) → 2NOCI(g) was performed and the following data obtained: (under…

A: Answer: For every reaction, in respect to its order, there is always a certain type of…

Q: Time (s) 0 1 2 3 4 5 [N2O5] (mol.dm-3) 1.000 0.705 0.497 0.349 0.246 0.173…

A: The concentration of reactant N2O5 and time is given as, Time (s) 0 1 2 3 4 5…

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

A: Since the reaction is first order, then the relationship between rate constant and half-life period…

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

A: Given:  First order rate constant K=1.6×10-3 yr-1 Rate constant for the decay of iodine k=0.011…

Q: percent of a given sample of the compound A decomposes in 60.0 min? Assume first-order kinetics. If…

A: As we know, First order kinetics λ=1tlnaoao-x=1tlnaoa Where, λ= Decay constant ao= initial…

Q: The decay behavior of a radioactive substance obeys first order kinetics: ln(N/No) = –kt, where N is…

A: The rate constant, k, for the reaction is calculated as shown below where t1/2 is half-life for the…

Q: The half-life for the radioactive decay of C-14 is 5730 years and is independent of the initial…

A: According to the given information, the half-life is independent of the initial concentration and…

Q: A reactant decomposes with a half-life of 197s when its initial concentration is .279 M. When the…

A: The rate law of a chemical reaction gives the dependence of its rate on a rate constant "k" and the…

Q: What is the first-order rate constant for its decay?

A: Relationship between t1/2 and k in first order reaction :-  t1/2 = ln 2/k  Or  t1/2 = 0.693/k  k is…

Q: the half- life for this process is 2.3 x 105s. What is the rate of the constant at this temperature?…

A:

Q: Normally, DNA has the familiar double helix coiled configuration. The uncoiling of DNA is a 1st…

A: Using the given half-life period, rate constant, k can be determined.

Q: Anthropologists can estimate the age of a bone or other sample of organic matter by its carbon-14…

A: Anthropologists can estimate the age of a bone or other sample of organic matter by its carbon-14…

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

A: Given: Rate constant k = 0.011 day-1 Initial concentration = 1.00 mg

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

A:

Q: 0.1 M of a material has a decomposition rate constant (k) of 2.46×105 M-1 s-1. What equation would…

A: Given, [A]o = 0.1 M  K = 2.46 x 105 M-1 S-1  Formula used : t1/2 = 1/K [A]o

Q: the half-life of radium 226 is 1620 years. how many hours will it take for a 5g sample to decay to…

A: The radioactive decay is a first order reaction. Since we know that the relationship between the…

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

A: Radioactive gold-198 is used in the diagnosis of liver problems. t1/2 = 2.7 days m0 = 5.6 mg How…

Q: The half-life for the radioactive decay of C-14C-14 is 5730 years. If a sample of C-14C-14…

A: For a radioactive decay rate constant K and half life t12 have the following relation. t12=0.693K…

Q: The radioisotope 1"C (half life = 5730 years) is used for carbon dating. What is the first order…

A: Given :- half life of radioactive 14C i.e. t1/2 = 5730 years  To calculate :- value of first order…

Q: The first-order rate constant for the decomposition of a certain antibiotic in water at 20oC is 1.65…

A: According to the first order reaction,k=1tlna0ak=rate constantt=timea0=initial…

Q: 11.What is a reaction for which half-life would be applicable? a.14/6C→14/7N+0/−1e…

A: option a first option is the answer half life for radioactive C14 is applicable in this reaction…

Q: gallium-67? What are the units for k?

A: Half life time(t1/2) = 78.25 hrs  Aa we know Radioactive decay follows first order kinetics Rate…

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…

Q: The activation barrier for the hydrolysis of sucrose into glucose and fructose is 108 kJ>mol. If…

A: Given: The activation barrier for hydrolysis of sucrose into glucose and fructose is 108 kJ/mol.

Q: The recombination of l atoms in the gas phase in the presence of argon (which removes the energy…

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Q: The decomposition of N2Os is an important process in tropospheric chemistry. The half-life for the…

A: Two numerical problems based on first order kinetics, which is to be accomplished.

Q: A substance undergoes first-order decomposition. After 37 min at 500°C, only 12.5% of the original…

A: The integrated rate equation for first order reaction is  k = 2.303tlog[R]o[R] k = rate constant t =…

Q: Archaeologists can determine the age of artifacts made of wood or bone by measuring the amount of…

A:

Q: O3Ni decays by a first-order process via the emission of a beta particle. The 63NI isotope has a…

A:

Q: A substance undergoes first-order decomposition. After 53 min at 500°C, only 12.5% of the original…

A: