Mercury-210 has a half-life of 10 minutes. How many minutes will it take for a sample of mercury-210 to decay through 5 half-lives?

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: The half-life of 234U, uranium-234, is 2.52 105 yr. If 98.9% of the uranium in the original sample…

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Q: After 40.0 days, how much Ac-225 remains if the starting mass was 73.0 g? Ac-225 has a half life of…

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Q: A radioactive sample contains 1.55 g of an isotope with a halflife of 3.8 days. What mass of the…

A: Given details, t1/2 = 3.8 days t = 5.5 days m0 = 1.55 g To calculate the mass of the isotope. By…

Q: The half-life of Oxygen-14 is 1.177 minutes.  You originally have 20 grams of it.  After roughly 3.5…

A: Given: Half-life of Oxygen-14 is 1.177 minutes Mass of Oxygen-14 is 20 g

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: 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: The Br-82 nucleus has a half-life of 1.0 x 103 min. If you wanted 1.0g of Br-82 and the delivery…

A: Given the half-life of Br-82, t1/2 = 1.0*103 min  Disintegration constant, λ = 0.693t1/2 =…

Q: In a dusty corner of a spooky abandoned lab, you find a vial labeled “70g of iron-55”.  You weigh…

A: Welcome to bartleby !  We have to calculate time required

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: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 5.3 g remain. What is the original…

A: The objective of this question is to find the original mass of the Cs-131 sample given its half-life…

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: Phosphorus-32 has a half-life of 14.0 days. Starting with 6.00 g of 32P, how many grams will remain…

A: Given: The half-life of phosphorus -32 =14.0 days i.e. t1/2=14.0 days Starting amount of P=6.00 g

Q: The isotope Bismuth-212 has a half life of 368.65 day. What mass in mg of a 2 mg sample will remain…

A: Half life of Bismuth, t1/2 = 368.65 days. Bismuth-212 is a radioactive element. Thus, it will follow…

Q: A rock constains Pb-206 to U-238 mass ratio of 0.245: 1.00. Assuming the rock did not contain any…

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Q: the half life of iodine-131 is 8 days, after how many days will a sample of it decay to 70% of its…

A: As we know,  Radioactive decay follows 1st order kinetics.Integrated rate law equation for 1st order…

Q: A substance has a half-life of 26 years. presently, if there are 6293 grams of the said substance,…

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Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 3.0 g remain. What is the original…

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Q: You have a sample of Bismuth-212 to prepare for an upcoming medical test.  This isotope has a…

A: The radioactivity follows first-order kinetics. The half-life relates to the rate constant, k for…

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: The half life of an isotope is 43 seconds. How long does it take 100.0g of that isotope to decay to…

A: Half life = 43 second k = 0.693half life= 0.69343 sec=0.016 s-1

Q: A rock found in the Australian Outback contains 438 g of Pb-206 for every 1.00 g of U-238. How old…

A: The objective of the question is to determine the age of a rock based on the ratio of Pb-206 to…

Q: A radioactive isotope has a half-life of 12.0 seconds. How much of a 100 gram sample is left after…

A: Given  Initial Mass of Sample ( A)0  = 100 gram  Half life time ( t1/2)   = 12 sec  Time ( t ) = 36…

Q: days. Suppose the initial amount of Thorium-234 is 192.9 mg, find the amount of Thorium-234 remains…

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Q: How long will it take for a 40.0-gram sample of Iodine-131 to decay to 1/16th of its original mass?…

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

A: We know nuclear decay follows First order kinetics. we have to use the formula - t12=ln2K from this,…

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: Calcium-45 has a half-life of 162.61 days. If 4 mg of this isotope remains after 300 days, what is…

A: Radioactive decay follows first-order kinetics. The half-life of the first-order reaction does not…

Q: Thallium-208 has a half-life of 3.053 min. How long will it take for 120.0 grams to decay to 10.0…

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Q: Bismuth-209 has a half-life of 2.01 x 1019 years.  How long will it take for 6.92 kg of bismuth-209…

A: We have to predict the time taken.

Q: A nuclear powerplant immediately emits 48.01 g of tritium, given its half life of 12.3 yrs.…

A: All natural and artificial radioactive decays follows first order kinetics. The half life of first…

Q: Half life iridium 192 is 106.51 days. How many days are required for 60 mg to decay to 7.5 mg

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Q: half-life of 4.536 days

A: Given data are as follows: Calcium-47 half-life = 4.536 days Initial weight of Calcium-47 = 250g

Q: After 40.0 days, how much Ac-225 remains if the starting mass was 94.0 g? Ac-225 has a half life of…

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Q: If the half-life of iodine-131 is 8.10 days, how long will it take a 50.00 g sample to decay to 6.25…

A: Given - Half life of iodine -131 =8.1 0 days  Initial weight of sample= 50.00 gram  Final weight of…

Q: The half-life of cesium-129 is 32.0 hours. How much time is required for the activity of a sample of…

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Q: The half-life of radon-222 is 3.82 days. If you begin with 36.7 mg of this isotope, what mass…

A: Half life of radon-222 (t1/2) = 3.82 daysInitially mass of radon-222 = (Rn)0 = 36.7 mgmass of…

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

A: Data