The half-life of P-33 is 25.3 days. How long will it take for 64 g of P-33 to deplete to 1.0 g? A. 11 days B. 75 days C. 100 days D. 120 days E. 152 days

Q: Consider a radioactive sample with a half-life of one week. How much of the original sample will be…

A: Half-life period is defined as the time taken for amount of the sample to reduce to half of its…

Q: pure polonium-210 (k = 5.02 × 10−3 day−1) were used in a crime, based on radioactive disintegration…

A: Radioactive disintegration follow first order kinetics

Q: 120 mg sample of technium 99m is used for a diagnostic test. if a technium 99m has a half-life of…

A: Given- Initial mass = 120 mg Half life = 6.0 hrs To find- milligrams of the technetium 99M sample…

Q: Na-24 is a radioactive isotope that has a half-life of 15 hours. What percent of the original sample…

A: Radioactive decay follows first order kinetics.  k = 0.693/t0.5 ....(1)  Here, t0.5 = 15 hours…

Q: How much of a 24 g sample of radium 226 will remain unchanged at the end of 3 half-life periods?

A: Given,  Mass of the sample of radium 226 = 24 g  Mass of the sample of radium 226 remain unchanged…

Q: 4. Radon-222 has a half-life of 2.8 days. How many half-lives will pass after 28 daysa O 19 O 5 O 10…

A: Given that: half life of Rn = 2.8 days To find: How many half life will pass after 28 days?

Q: Technetium-99m, an important radionuclide in medicine, has a half-life of 6.0 hours. What percentage…

A: Formula for radioactive decay is given as,

Q: A radioactive isotope has a half-life of 11 minutes.  How many grams of a 18.68 g sample remain…

A: Given Half life = 11minutes = 11*60= 660 second Sample weight = 18.68g Time = 44 minutes = 44*60=…

Q: 8. What mass of plutonium-240 will remain after 32,820 years if the initial sample contained 4.8 g…

A: No. of half lives = Total time/ half- lives n = 32820/6564 = 5 n = 5

Q: Calculate the half-life of a radioisotope if it takes 72 years for a sample to decay to 12.5% of its…

A: 100 % to 50 % one t1/2. 50 % to 25 %  second t1/2. 25% to 12.5 third t1/2. three t1/2 = 72 years.…

Q: The half-life of Ga-67 is 77.9 hours. How long will it take Ga-67 to decay and lose 95% of its…

A: Radioactive decay follows first order kinetics. k = 0.693/t0.5 = 0.693/77.9 hour^-1 = 0.008896…

Q: Gold-198 has a half-life of 2.7 days. How much of a 488.6 mg gold-198 sample will remain after 13.5…

A: We have half life as 2.7 days, we have initial amount as 488.6 mg, we have to calculate the sample…

Q: 1. Phosphorous - 32 has a half - life of 14 days.  After how many days will a 1000 mg sample decay…

A:

Q: 31. Uranlum 235 decays to Lead 207 with a half-life of 0.7 billion years. What Is age of a rock…

A:

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: Magnesium-23 is a positron emitter with a half-life of 11.3039 min. How much of a 1.80-g sample of…

A: Radioactivity is a phenomenon in which nuclei of certain elements undergo spontaneous disintegration…

Q: How long for Ce-144 (half-life: 280 days) to decay down to 0.50% of its original amount?   2,100…

A:

Q: the half life of carbon-14 is 5730 years. how long does it take for 2.6 grams of carbon-14 to be…

A:

Q: 210Rn has a half-life of 2.4 hours. You have a sample that contains 24 g of 210Rn. How much 210Rn…

A: The relationship between the half-life, T1/2 and the decay constant is given by  or,  The…

Q: If you are given a sample of 14 g of a radioactive substance and waited for 4 half-lives to pass,…

A:

Q: I-131 has a half-life of 8.04 days. If a sample initially contains 20.0 g of I-131, approximately…

A: Interpretation -  To determine the amount of I-131 after 32 days when I-131 initially contains 20g…

Q: Beginning with 100 g of iron-55, calculate how much remains after 7.7 years.  The half-life of…

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

Q: Suppose 67.5% of a sample of radioactive 24Na has decayed after one day. Estimate the half-life of…

A: Solution is given below in next step

Q: Phosphorus-32 has a half-life of 14.0 days. Starting with 6.00 gg of 32P32P, how many grams will…

A:

Q: Calculate the half-life of a radioisotope if it takes 144 years for a sample to decay to 12.5% of…

A: N = 0.125 No N/No = 0.125

Q: A certain isotope has a half-life of 2.00 days. How much of a 4.00g sample of this isotope will…

A: Since the decay reactions are first order reactions Hence we can say  1) Half life = ln(2) / K 2)…

Q: Th-234 has a half-life of 24.1 days. If a 355 mg sample is initially present, how many half-lives…

A: Given  Half life ( t1/2 )  = 24.1 days  Initial amount  = 355 mg  Time ( t ) = 96.4 days  Number of…

Q: Carbon-15 has a half-life of 2.5 seconds. Suppose we have a sample containing 200 mg of carbon-15.…

A: In this question, we will determine the how much mass of C-15 will remain after 5second. Given that,…

Q: 4. After 24.0 days, 2.00 grams of an original 128.0 gram sample remain. a. How many half-lives…

A: 4) Given that Initial mass of the sample (C0) =128.0 g  Mass of the sample remained after 24.0 days…

Q: Cobalt-60 is used extensively in medicine as a source of g-rays. Its half-life is 5.27 years. How…

A: Given Half life ( t1/2 )   = 5.27 year  Initial Activity ( A0 )  = 100 %  Remaining amount ( At ) =…

Q: The half-life of radium is 1620 years. If a laboratory has 32 grams of radium, how long will it take…

A: Data

Q: Fluorine-18 decays to form a positron and oxygen-18. After 90.0 minutes, 1.00 18O is present…

A:

Q: Carbon-14 has a radioactive half-life of about 6,000 years. If an organism has 10 g of carbon-14 in…

A: Provided half life (t1/2)=6000year Also, provided time(t)=6000year Initial amount (A•)=10g of…

Q: lodine-131 is a radionuclide that is frequently used in nuclear medicine. Among other things, it is…

A: Sample mass of Iodine - 131 initially = 0.16 gram Half life of iodine-131 = 8 days We know that…

Q: Iron-59 is used to study iron metabolism in the spleen. Its half-life is 44 days. How many days…

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.