Ask a New Question
Search
Asked by
Anonymous
if the half life of a radioactive isotope is 80 hours how long would it take for 75% of the isotope to decay
Answers
Answers
Answered by
oobleck
if 75% has decayed, 25% is left
1/4 = (1/2)^2
so it takes two half-lives, or 160 hours
Related Questions
Related
If C14 has a half-life of 4,000 years, what fraction will be remaining after 36,000 years?
If I 131 has a half-life of 8 days, what fraction will be left after a year?
The half-life for the radioactive decay of U-238 is 4.5 billion years and is independent of initial...
The half-life for the radioactive decay of calcium-47 is 4.5 days.If a sample has an activity of 4.0...
The half-life of Th-232 is 1.4E10. Find the number of disintegrations per hour emitted by 1 mol of T...
2. The half-life of a radioactive element is important when considering its application in medicine....
What is the half-life (in h) for the decomposition of O3 when the concentration of O3 is 2.37 ✕ 10−6...
The half-life for the first order reaction of a substance A is 50.5 s. How much time is needed for t...
What happens to the half-life of Uranium-238 if the number of U particles in the bucket is increased...