A radioactive sample has a decay constant of 55.0 x 10-¹2 s¹. Estimate its half-life.
Q: Atts, you have a pure sample of an unknown substance. At t= 293 s, 36.8% of the substance remains.…
A: Radioactive substance remaining at t=293s, N=36.8100×N0=0.368N0
Q: The number of radioactive atoms in a sample decay as the emission of radiation proceeds and this may…
A:
Q: Krypton-81m (81mKr) is a radioactive isotope with a half-life of 13.1 s that is often used in…
A: The correct option is (e) 50.26 s
Q: An ancient artifact is found to contain 250 g of carbon and has an activity of 475 decays/min.…
A: Answer :- Given :- = decay constant = 16 N = amount of substance = 250 g
Q: Calculate the binding energy (in MeV) per nucleon for an α-particle (4He nucleus), given that the…
A: Since you have asked multiple questions we will solve first question for you.please post remaining…
Q: By READING the R vs t graph shown below, determine R, & the half-life. R (x10¹2 decays/h) 80 60. Ro…
A: Given From the given graph of Decay rate vs time R0 is the rate of decay at t =0 Therefore , R 0…
Q: Use the values from PRACTICE IT to help you work this exercise. (a) Find the number of remaining…
A:
Q: A radioactive sample is observed for 160 days. After 160 days the amount of the sample is found to…
A: Radioactive decay is the process by which an unstable nucleus becomes stable. The rate at which this…
Q: The main dangerous radioactive material left over after the Chernobyl disaster is Caesium-137. The…
A:
Q: the decay constant or the beta decay of ^99 43Tc was found to be equal to 1.0x10-13/s. What is the…
A:
Q: Technetium-99 is an unstable isotope. Given a half-life of 8.01 hours, what is the activity (in…
A: Determine the decay constant.
Q: The radioactive isotope 209 Po has a half-life of 103 years. How long would it take 84 for only 4.00…
A: Given: The half-life time is 103 years. The remaining sample is 4 g. The total amount of the sample…
Q: A radioactive sample is observed for 5 days. After 5 days the amount of the sample is found to be…
A: Radioactive decay is the process by which an unstable nucleus becomes stable. The rate at which this…
Q: A radioactive sample has an activity of 250 Bq and contains 6.52×10¹³ radioactive nuclides. Estimate…
A: The rate at which this decay takes place in a given sample of radioactive material is called its…
Q: A radioactive sample has a decay constant of 2.97 x 10 s¹¹. Estimate the half-life.
A: Unstable nuclei decay into a stable state. This process is called radioactivity. The rate at which…
Q: a) The half-life of iodine-125 is 59.4 days. If the initial mass of iodine-125 is 128 µg, what mass…
A: a) Given, the half-life of iodine-125 is T12=59.4days the initial mass of iodine is…
Q: What is the half-life of an isotope that decays to 6.25% of its original activity in 60.2 h?
A:
Q: Suppose we have a sample containing 1.91 mCl of radioactive 131 (t,2 - 8.04 d). (a) How many decays…
A: Solution: Given that half-life of the sample, t1/2 = 8.04 days = 694656 s. Time for decay, t = 5week…
Q: What is the half-life in days of a radioactive sample with 3.0x1015 atoms and an activity of 6.2x108…
A: In this problem, we are given the number of atoms in a radioactive sample (N = 3.0x10^15 atoms) and…
Q: a sample containing l-131 has an activity of 6.4x10^8 Bq.h how many days later will the sample have…
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Q: A sample of radioactive material is studied in a lab and is found to have a decay constant of 100 ×…
A: When an atomic nucleus becomes unstable they become stable by radiating energy this process is known…
Q: A nuclide whose "generic" symbol is 6430X would have protons and neutrons.
A: The generic symbol of a nuclide is given as X3064.
Q: A sample of carbon of mass 6.74 g taken from an animal jawbone has an activity of 4.00 decays/min.…
A: Given that the 6.74 g of carbon taken from the jawbone. The no. of moles in 6.74 g of carbon be…
Q: What is the Decay Rate (k), if the Half Life is 10.5 days?
A:
Q: Determine the half-life (in s) of a radioactive sample that has a decay rate of 3.30 ✕ 1011 Bq when…
A: Given. N = 1.7*10¹⁵ dN/dt = 3.3*10¹¹ Formula used N(t) = N⁰*0.5t/T Where T is half life
Q: Marie and Pierre Curie managed to extract 1 mg of radium from ten tonnes of uranium ore in 1898. The…
A: The decay constant for radium-226 can be calculated using the following formula: λ = ln(2)/ t½ Where…
Q: 8. The half-life for a radioactive isotope is 4.00 × 10⁹ yr. Determine the age (in years) of a rock…
A:
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- A radioactive sample is prepared; 10.78 hours later, only 1/16th of the original sample remains. What is the half-life of this radioactive sample in hours? Round to one decimal place.The mass defect for potassium-40 is: -___x10-28kg. (Give your answer with 3 sig digs and do not include units) Use mass of proton = 1.007276 u mass of neutron = 1.008665 u actual mass = 39.9687 uTritium (half-life = 12.3 yr) is used to verify the age of expensive brandies. If an old brandy contains only 1 64 of the tritium present in new brandy, then how long ago (in yr) was it produced?
- A radioactive substance has a half life of 2120 years. A) Determine the rate constant for the decay of this substance. B) How long will it take for 80% of the substance to decay?1.5 The binding energy per nucléon for °Fe is 8.8 MeV per nucléon. Estimate the energy released per kilogram of matter by the sequence of reactions which fuse hydrogen to iron.The half-life of 60?? is 5.27 years. The activity of a 60?? is 3.50 × 109 Bq. What is the mass of the sample?
- A radioactive sample has a half-life of 28 mins. If the initial amount of sample was 2 g, estimate how much will be left after 40 mins,How many days The half-life of a radioactive isotope is 140 d. would it take for the decay rate of a sample of this isotope to fall to one-fourth of its initial value?A pure sample of a newly discovered radioactive isotope is discovered. It has a half-ife of S9 min. Determine how long until only 1/16 of the original amount remains,
- If it is known that 87% of an initial radioactive sample remains after 3 days, what is the decay rate λ of the sample in units of decays/day?The half-life of beryllium-7 is about 53.3 days. (a) Determine the decay constant for beryllium-7. (b) What percentage of a sample remains undecayed after two weeks (1.21 ✕ 106 s)?A radioactive sample has a decay constant of 49.15x10-12 s¹. Estimate the half-life.