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116. Solving a chemistry problem
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Uploaded: 11.08.2022
Content: 61.rar 16,68 kB
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Uploaded: 11.08.2022
Content: 61.rar 16,68 kB
Product description
61. After how many years will the number of nuclei of radioactive strontium-90, which fell out with radioactive fallout as a result of a nuclear explosion, become less than 1.0% of the original amount? The half-life of 90Sr is 27 years.
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