You have 86.237g of a radioactive element with a half-life of 43.91minutes. After 3.09 half-lives have passed, how many grams of the radioactive element remain? Report your answer to 2 decimal places.
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You have 86.237g of a radioactive element with a half-life of 43.91minutes. After 3.09 half-lives have...
You have 82.173g of a radioactive element with a half-life of 53.39minutes. After 4.05 half-lives have passed, how many grams of the radioactive element remain? Report your answer to 2 decimal places. Answer 4.96
224. You have 83.525g of a radioactive element with a half-life of 52.01minutes. After 254.3 minutes have passed, how many grams of the radioactive element remain? Report your answer to 2 decimal places.
A radioactive element decays with a half-life of 100 years. If there are 10 grams of this element today, how many grams will remain 50 years from now? - O A 10 V OBS 15 Ос. 2 D. 10/2 O E. 10 Reset Selection
The half-life of the radioactive element unobtanium-43 is 10 seconds. If 176 grams of unobtanium-43 are initially present, how many grams are present after 10 seconds? 20 seconds ? 30 seconds? 40 seconds? 50 seconds? The amount left after 10 seconds is grams The half-life of the radioactive element unobtanium-43 is 10 seconds. If 176 grams of unobtanium-43 are initially present, how many grams are present after 10 seconds? 20 seconds? 30 seconds? 40 seconds? 50 seconds? The amount left...
After 2 half-lives have passed, what % of the original radioactive isotope remains?
Part A: Tritium is a radioactive isotope of the element hydrogen. Tritium has a half-life of 12.5 years. How many years would it take until only 3.22% of a sample remain? Answer should be in years. Part B: Radioactive Carbon-11 has a half life of only 20.3 minutes and an atomic mass number of 11 u. Calculate the activity of 3.58 g of Carbon-11. Answer should be in Bq.
9. [-14 Points] DETAILS SPRECALC7 4.6.017. This exercise uses the radioactive decay model. The half-life of radium-226 is 1600 years. Suppose we have a 28-mg sample. (a) Find a function m(t) = moz-th that models the mass remaining after t years. m(t) = (b) Find a function m(t) = moet that models the mass remaining after t years. (Round your value to six decimal places.) m(L) = (c) How much of the sample will remain after 2500 years? (Round your...
The half-life of a certain radioactive element is 48.0 hr. a) Determine the decay constant in s^-1. b) If we started with 100.0 grams of this element, how much would be present in grams after 20.0 days? Work this out using the exponential decay formula.
(Can you show work for these questions) If a radioactive material decomposes with a half-life of 2 days, how much of a 16- gram sample will remain after 10 days? A. 4.0 grams B. 2.0 grams C. 1.0 grams D. 0.5 grams If 2.5 grams of a radioactive isotope exist after 30 days in a storage vial, how much was present when it was sealed if the t1/2 = 6 days? A. 80 grams B. 60 grams C. 40 grams...
2. What are the units of half life? How many half lives have expired when a radioactive object decays to 12.5% of its original radioactivity?