The radioactive isotope I decays by beta emission. If the mass of a sample of iodine-131 decays from 80.5 micrograms to 20.1 micrograms in 16.1 days, what is the half-life of iodine-131? Half-life = |days

Q: If the amount of a radioactive element decreases from 0.36 g to 90. mg in 22 min, what is its…

A: Half-life (t1/2) is defined as the time required by a substance to reduce to half of its initial…

Q: Use the References to access important values if needed for this question. The radioactive isotope…

A: To find half life.

Q: Pls. refer to the given answer choices so that i will know if my solution is wrong

A: 100% undecayed  at time 0 .

Q: How many half‑lives of the unknown radioactive substance have occurred?

A: As we know that decay of radioactive substance follows first order kinetics

Q: The amount of radio active material present at time t is given by A=Aoekt, where Ao is the initial…

A: For a first order reaction, the rate of reaction is proportional to the first power of concentration…

Q: Beginning with 1.00 g of a sample of an unknown radioactive isotope, 0.05674 g of the isotope will…

A: The answer to the following question is-

Q: The number of radioactive nuclides in a sample decays from 3.80 x to 1020 19 9.50 x 10 in 58.0…

A:

Q: If the mass of a sample of radioactive cesium-137 decays from 71.9 milligrams to 20.8 milligrams in…

A: The integrated rate law expression for the first-order kinetics is: Half-life relates to the rate…

Q: Enter your answer in the provided box. A rock sample originally contains 3.20 mg of 238U. How much…

A: Given data  Initial amount of 238U : No= 3.20 mg final amount of 238U : N = ? mg half life  : t1/2 =…

Q: 4. The half-life of bismuth-212 is 1 hour. If 12g of bismuth are allowed to decay, what mass of…

A:

Q: 1. A 1 kg mass of radioactive material was left to decay in a laboratory. After 12 years, the…

A:

Q: After 60 days, 10 grams of radioactive isotope remains from an original 27 g sample. What is the…

A: Given,

Q: Iodine 1 31 has a half life of about 8 days.  In 40 days what percent of the original sample would…

A: Formula used :-  t1/2 = .693/k  Where k is rate constant. k = 2.303/t log [A0]/[A]

Q: The initial amount of the radioactive material V in a rock is determined to be 6.78 mg. Only 1.46 mg…

A: final answer is = 5.3200 mg

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

A: Radon 222 is a radioactive substance which undergoes radioactive decay Here we are required to find…

Q: Enter your answer in the provided box. A rock sample originally contains 3.32 mg of 43°U. How much…

A:

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

A: Given -> Half life = 3.82 days

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: A radioactive substance has a ​half-life of 437 years. What is its decay​ rate?

A: Radioactive Decay: Radioactive decay is the property of the several naturally occurring elements as…

Q: A sample of lead isotope Pb decays by 209 82 emitting an alpha particle to form the nuclide W. If…

A:

Q: A radioactive sample contains 1.55 g of an isotope with ahalf-life of 3.8 days. What mass of the…

A: Radioactive isotopes may occur naturally or be artificially produced. Radioactive isotopes possess…

Q: A The balf-life of barium-131 is 12 days. How many grams remains after 60 days if the initial sample…

A:

Q: A certain radioisotope has a half-life of 6.58 days. What percentage of an initial sample of this…

A:

Q: The number of a certain radioactive nuclide present in a sample decays from 59,122 to 429 in 9.23…

A: Given: No=59122Nt=429t=9.23 days Half life of the radioactive species refers to the time required to…

Q: A radioactive isotope decays from 60 grams to 15 grams in 20 seconds. What is its half-life? a) 20…

A: The radioactive decay is an example of first order reaction.

Q: A radioactive sample initially contains 2.40×10^−2 mol of a radioactive material whose half-life is…

A:

Q: A radioactive material decays at a rate proportional to its amount. If the material has a half-life…

A: To solve this question, first find out rate constant using half life and then use that to find out…

Q: After 60 days, 10 grams of radioactive isotope remains from an original 80 g sample. What is the…

A: Law of radioactive decay: Law of radioactive decay relates the amount radioactive substance…

Q: The half life for the decay of carbon-14 is 5.73 x 10³ years. Suppose the activity due to the…

A: We need to calculate age of the wood sample

Q: A radioactive sample contains 2.90 gg of an isotope with a half-life of 3.8 days How much of the…

A: Given- Initial mass = 2.90 g Half life = 3.8 days To find- mass of the isotope in grams remaining…

Q: After 31 years, what mass (in g) remains of a 45.0 g sample of a radioactive isotope with a…

A: Given, Half life (t1/2 )= 7.3 years time (t) = 31 years Number of radioactive atoms present…

Q: The radioactive substance neptunium -139 decays to 72.85% of its original amount after 28 hours. How…

A: For radioactive decay, relation between rate constant and its concentration is give below.…

Q: Lead-211 is a radioactive isotope with a half life of 36.1 minutes.  How long will it take for only…

A: Chemical kinetics is branch of chemistry that deals with rates of chemical reactions.

Q: A radioactive isotope has a half life of 60.2 minutes.How long will it take for radiation from a 325…

A: The radioactive decay of an isotope follows a first-order reaction, The integrated rate law for a…

Q: If 20% of the radioactive substance disappears in one year, find its half-life assuming exponential…

A:

Q: One of the nuclides in spent nuclear fuel is U-235, an alpha emitter with a half-life of 703 million…

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

Q: A sample of radioactive radon-222 was found to have a half life of 3.823 days.  What fraction of…

A: All natural and artificial radio active decays follows first order kinetics  The integrated rate…

Q: The half-life of bismuth-212 is 1 hour. If 12g of bismuth are allowed to decay, what mass of bismuth…

A: The time taken during a reaction to reduce the concentration of a reactant to half of its initial…

Q: 3. Suppose a sample of carbon-243 has a half-life of 3427 years. How long does it take for 80% of a…

A: In this question, we have to find out the correct answer of given problem by the help of the…

Q: A 26.00-g sample of water containing tritium, 3 1H, emits 1.50 * 103 beta particles per second.…

A: In radioactive decay, radioactive atom's nuclei (unstable) eject energy as well as charged particles…

Q: The half-life of a given radioactive substance is 2.5 minutes. What fraction of the original…

A: Given, half-life , t1/2 = 2.5 min                     and, t = 10 min We need to calculate the…

Q: The half life for the decay of carbon-14 is 5.73 × 10° years. Suppose the activity due to the…

A: Given: The half-life for the decay of carbon= 5.73×103 years The activity of fresh wood sample= 99…

Q: A radioactive isotope has a half-life of 60.2 days. What fraction of the isotope remains after 418…

A: Provided half life(t1/2) = 60.2 days Provided time(t)=418 days Let initial amount= [A•] Let final…

Q: The 175Pt isotope has a half-life of 2.53 seconds. What percentage of the original quantity of 175Pt…

A: The radio active decay follows first order kinetics. The half life t1/2 and rate constant K of a…

Q: A certain radioisotope has a half-life of 9.54 days. What percentage of an initial sample of this…

A:

Q: The half life for the decay of carbon-14 is 5.73 x 10° years. Suppose the activity due to the…

A:

Q: One of the nuclides in spent nuclear fuel is U−234U−234, an alpha emitter with a half-life of…

A: Welcome to bartleby !  We have to calculate time (years)

Q: Polonium-210 is a radioactive substance with a half-life of 138 days. If a nuclear facility is…

A:

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.