C-11 has a half-life of 20.3 minutes. What percentage of a C-11 sample will remain after 1 hour?
C-11 has a half-life of 20.3 minutes. What percentage of a C-11 sample will remain after...
if a reactant has a half life of 20 minutes, what percentage of it will remain after 80 minutes? please explain in details how to solve this problem.
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.
A radioactive sample has a half-life of 10 minutes. What fraction of the sample is left after 40 minutes ? 1/2 1/4 1/8 1/16 Which one is correct ?
What fraction of a sample of 6832Ge, whose half-life is about 9 months, will remain after 2.1 yr ?
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.
A 1.00g sample of nobelium, 254No, has a half-life of 55 seconds after it is formed. What is the percentage of 254No remaining 5 minutes after it forms. 0.0228 % 254No remains 0.438 % 254No remains 2.28 % 254No remains 4.38 % 254No remains
The Cs-131 nuclide has a half-life of 30 years. After 120 years, 8.7 g remain. What is the original mass of the Cs-131 sample?
Hydrogen-3 is radioactive and has a half life of 12.3 years. What percentage of a sample would be left after 1.32 years? Round your answer to 2 significant digits.
Iodine-125 is radioactive and has a half life of 60.25 days. What percentage of a sample would be left after 107. days? Round your answer to 2 significant digits. % X + ?
The half-life of nitrogen-13 is approximately 9.97 minutes. How much of a 3 gram sample of nitrogen-13 would remain after 8 minutes? Round to three decimal places