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Chemistry, 25.11.2021 14:00 21960

48. 227Ac has a half-life of 21.8 years. How long will it take for a sample of 227Ac to reach
a
20.0% of its initial amount?

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48. 227Ac has a half-life of 21.8 years. How long will it take for a sample of 227Ac to reach

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