A 26.00-g sample of water containing tritium, 3 1H, emits 1.50 * 103 beta particles per second. Tritium is a weak beta emitter with a half-life of 12.3 yr. What fraction of all the hydrogen in the water sample is tritium?

Q: Thorium-234 has a half-life of 24.1 days. Suppose the initial amount of Thorium-234 is 162.9 mg,…

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

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 isotope 208 Tl undergoes Beta- decay with a half-life of 3.1 minutes. Calculate the amount…

A: Given, T208I undergoes beta decay. T1/2= 3.1 min initial concentration , CA0= 41.4 g time , t =…

Q: If the amount of a radioactive element decreases from 2.4 g to 0.30 g in 12 days, what is its…

A: Given: Initial amount of radioactive element, N∘=2.4gFinal amount of radioactive element, N =…

Q: A 1.55 g sample of an isotope has a half-life of 3.8 days. What mass of sample is left after 5.5…

A: given data,sample of an isotope or initial amount of sample =1.55 g sample half life =3.8…

Q: Technicium-104 has a half-life of 18 minutes.If the initial mass is 100.0g,how much remains after 90…

A:

Q: Moonrock collected by a US Apollo mission is estimated to be 4.30 billion years old by uranium/ lead…

A:

Q: How much time in minutes would it take for a 2.301 g sample of 3H to decay to a mass of 1.789 g if…

A: The initial concentration (N0), final concentration (N), and time (t) required to convert the…

Q: If uranium-238 has a half-life of 45 billion years, how many years would it take for a 10-gram…

A: Given  Half life of U-238 (t1/2)   = 45 billion years 1 billion years    = 109 years  45 billion…

Q: If you start with 71.0 grams of a radioactive substance with a half life of 3 days, how much will be…

A: Here given, Initial amount (N0) = 71 grams Half life (t1/2) = 3 days Time (t) = 15 days Amount left…

Q: 222Rn has a half-life of 3.82 days. If a sample contains 36.2 mg of 222Rn, what mass of the isotope…

A: We have to calculate the amount after 6.81 days.

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

A:

Q: A sample of gas from a basement containing radon-222 has an activity of 7 pCi/L, which is above the…

A:

Q: Plutonium – 236 is an alpha emitter with a half-life of 2.86 years. If a sample initially contains…

A: Given data Half life : t1/2=2.86 year Initial amount : No=2.56 mg time : t=7 year…

Q: The half-life of Po-218 is 3.1 minutes. How many grams of Po-218 would be left after 9.3 minutes, if…

A: M

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: Cobalt-60 is a beta emitter with a half-life of 5.3 years. Approximately what fraction of cobalt-60…

A: The half life of cobalt-60 is = 5.3 year The fraction of cobalt-60 atoms will remain in a particular…

Q: 231y The isotope 23 Pa undergoes a series of a and 8 decays, ending up as 20 Pb. Overall during this…

A:

Q: Potassium 40 has a half life of 1.3 billion years.  If no half lives had passed, what percentage of…

A: A numerical problem based on half life period, which is to be accomplished.

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: Iodine-131 has a half-life of 8.04 days. If you begin with 2.7 mg of radioactive "I what mass…

A: Half-Life: The half-life of a radio active material will tell us the time it takes for one-half of…

Q: A 40.0 mg sample of a radioactive substance decays to 10.0 mg in 10 days. What is the half-life of…

A:

Q: The half-life of tritium is 12.32 yrs. If 49.1 mg of tritium remains of a sample with an initial…

A:

Q: The half-life of tritium is 12.32 yrs.If 49.1 mg of tritium remains of a sample with an initial mass…

A: The question is based on the concept of chemical kinetics. we have to calculate how much time has…

Q: In the next step of the neptunium-237 decay series, very unstable francium-221 is produced.  Given…

A: Here we are required to find the amount of Francium 221 remain after 7.32 minutes.

Q: A sample of iodine-126 with an original mass of 15.00 mg loses 13.125 mg of the original mass of the…

A:

Q: The half life of bismuth-213 is 46 minutes.  How much of a 20 g sample of bismuth-213 is left after…

A: The unstable nucleus or isotope undergoes radioactive decay to form a stable nucleus. This process…

Q: Cobalt-60 is a beta-emitter used in radiation cancer treatment equipment in hospitals. What total…

A: Given Initial mass = 24 g half life = 5.33 years time = 16 years

Q: Bismuth-210 is a beta emitter with a half-life of 5.0 days. If a sample contains 1.2 g of Bi-210…

A: Given data:

Q: 145 g sample of radioactive has a half live of 6.4 days how many g of material is left are 2 half…

A: The time required to disintegrate the molecule to half of its initial concentration is called the…

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: 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: The free neutron is an unstable particle that decays into a proton. What other particle or particles…

A: Radioactivity is a process in which unstable atomic nuclei spontaneously disintegrate into atomic…

Q: Plutonium-236 is an alpha emitter with a half-life of 2.86 years. How long will it take for the 1.20…

A:

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: 1. Gold-198 is used in the diagnose of liver problems. The half-life of Au is 2.69 day. If you begin…

A: Given data: half life of 198Au = 2.69 day Initial concentration of  198Au is 2.8 μg Time = 10.8 day

Q: Technetium-99 which has a half life of 6 hours is a useful isotope in diagnostic tests. If a patient…

A:

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: A radioactive isotope has a half-life of 84.5 minutes. How long will it take for the radiation from…

A: Half life t1/2 = 84.5 min = 5070 s

Q: The radioactive isotope *Pa decays by beta emission. 234 If the mass of a sample of protactinium-234…

A: Initial mass of isotope M = 83.5 ug Final mass of isotope M' = 20.9 ug  Time of decay t = 13.5 hours…

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: Technetium-99 which has a half life of 6 hours is a useful isotope in diagnostic tests. If a patient…

A:

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: When will a 1.00 g sample of thorium–232 have a mass of 1.00 mg, knowing that the half – life of…

A:

Q: Iron-59 has a physical half-life of 45 days. If 96 g of a radioactive iron sample (59Fe) is received…

A:

Q: Strontium-90 has a half life of 28 years. If a 5.31 mg sample was stored for 112 years, what mass of…

A: Reaction in which rate is linearly depend upon one reactant is known as first order reaction.

Q: A sample of Thorium-228 has a half-life of 1.9116 years. What percent of Thorium-228 remains after…

A: Applying basic concept of radioactivity.

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.