A mixed thorium decay product sample is separated into elements, yielding a 1.19mg sample of relatively pure actinium-225. What is the activity of this sample? Express your answer in curies. Ci The 1.19 mg sample is shipped to another treatment center over the course of 75 hours. How much actinium-225 remains upon arrival? mg

Q: Uranium -238 decays in a series of steps to Pb-206. When the material is very old, one can treat the…

A: Radioactive decay follows 1st order reaction.  Given the half-life, t1/2 = 4.50*109 yr

Q: It takes 4 h 39 min for a 2.00-mg sample of radium-230 to decay to 0.25 mg. What is the half-life of…

A: Half life of first order kinetic reaction is given by:

Q: the half life of radioactive element unobtanium-37 is 10 seconds. If 80 grams of unobtanium-37 are…

A:

Q: Krypton-87 has rate constant of 1.5 x 10 -4 / s. What is the activity of a 2.0 mg sample?

A: Welcome to bartleby ! Introduction : We have to calculate activity of sample

Q: A medical technician is working with the four samples of radionuclides listed in the table below.…

A: Since you have posted a question with multiple sub-parts we will solve the first three sub-parts for…

Q: If the half-life of Bk-248 is 23.7 hours, what percentage of the original quantity of the isotope…

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: After 119 days have elapsed, 1/12 of a radioisotope sample remains undecayed. What is the half-life…

A: Amount of radioisotopes remaining = 112 of the initial amount Number of days taken for the decay =…

Q: The half-life of Radium-226 is 1600 years. A sample has 100 mol remaining after decaying for 64…

A: Given, Remaining moles of Radium-226 after decay = 100 mol Half life of Radium-226 = 1600 years.…

Q: The half-life of protactinium-231 is 3.25 x 104 years. How long will it take for 43.4 grams of…

A: Find out the time period by using the formula, Where,              Ao = Initial amount  At = Amount…

Q: Iodine-131 has a half-life of 8 days. What fraction of the original sample would remain at the end…

A: Half life is the period at which concentration of reactant reduces half of its original value.

Q: If 29.5% of the original amount of 14C is present in a wooden tool at the time of analysis, what is…

A: Since the carbon decay is a first order kinetics reaction Hence for the first order reaction we can…

Q: medical technician is working with the four samples of radionuclides listed in the table below.…

A:

Q: The half-life of 51Cr is 2.78×101 day. Calculate how much time it would take for an isolated…

A:

Q: The half life of 52Fe is 8.28 hours. Suppose we measure the activity of a sample containing 52Fe and…

A: Calculation of disintegration constant (λ):T1/2 of 52Fe is = 8.28 hours.

Q: A medical technician is working with the four samples of radionuclides listed in the table below.…

A: Answer..

Q: The half-life for the alpha decay of 226Ra to form 222Rn is 1.60×10 y. Suppose the energy of the…

A:

Q: 1. After 119 days have elapsed, 1/12 of a radioisotope sample remains undecayed. What is the…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: The​ half-life of​ silicon-32 is 710 years. If 20 grams is present​ now, how much will be present…

A: Radioactive decay is always a first order reaction. The rate equation for the radioactive decay is :…

Q: A wooden artifact is burned and found to contain 21g of carbon. the 14c activity of the sample is…

A: The half-life of a reaction is the time taken for the reactant to reduce to half its initial value…

Q: After 19 days have elapsed, 1/21 of a radioisotope sample remains undecayed. What is the half-life…

A:

Q: Radium-223 decays with a half-life of 11.4 days. How long will it take for a 0.240 mol sample of…

A:

Q: What is the half-life of chromium-56 if 12.8 minutes are required for the activity of a sample of…

A: Radioactive decay follow first order kinectics . Half life for first order reaction  = 0.693/k  k is…

Q: A wooden artifact is burned and found to contain 21g of carbon. The ^14C activity of the sample is…

A: A freshly cut sample of a wood has the activity of 14C = 15 disintegrations per min per gram (fixed)

Q: A medical technician is working with the four samples of radionuclides listed in the table below.…

A: We need to arrange the given radioactive isotopes in order of radioactivity

Q: Krypton-87 has  a rate constant of 1.5 * 10-4 s-1. What is the activity of a 2.00 mg sample?

A: The activity of a sample of radioactive matter is defined by the number of disintegrations taking…

Q: he half-life of chromium-51 is 28 days. If the sample contained 510 grams, how much chromium would…

A: Given that

Q: After 119 days have elapsed, 1/21 of a radioisotope sample remains undecayed. What is the half-life…

A: Suppose the initial amount of sample be Ao After 119 days, amount remaining, A = (1/21) Ao The…

Q: A mixed thorium decay product sample is separated into elements, yielding a 1.19mg sample of…

A:

Q: A medical technician is working with the four samples of radionuclides listed in the table below.…

A: More the half life less will be the radioactivity vice versa.