Physics, 01.12.2021 22:50 english8971
Solve the following half-life problems.
1. The half-life of Pa-234 is 6.75 hr. How much (what fraction) of a sample of this isotope remains
after 20.25 hr?
2. The half-life of Rn-222 is 3.823 day. What was the original mass of a sample of this isotope if
0.0500 g remains after 7.646 day?
3. The half-life of Th-227 is 18.2 day. How many days are required for 0.70g of a given sample to
decay to 0.0875 g?
4. The half-life of carbon-14 is 5700 years. If a 10 gram sample undergoes decay for 17,100 years,
how many half-lives have the sample undergone?
Answers: 1
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Solve the following half-life problems.
1. The half-life of Pa-234 is 6.75 hr. How much (what frac...
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