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OpenStudy (anonymous):
Two scientists are experimenting with pure samples of isotope X, a highly radioactive substance. The first scientist has a sample with a mass of 20 grams. He measures a half-life of 232 seconds. The second scientist has a sample of the same substance with a mass of 80 grams. What is the half-life that she is most likely to measure?
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OpenStudy (anonymous):
Half-life is a characteristic of the substance not of the amount of the substance.
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