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GOB Chemistry 1 Final - 3! 3부
샘플
이것은 샘플 연습 세트입니다. 보다 개인화된 시험 준비 경험을 위해:
또는
11. Nuclear Chemistry / Radioactive Half-Life / 문제 21
문제 21

A sample of Mo-99 has a half-life of 2.75 days. After 16.5 days, the activity of the sample was reduced to 378 Bq. Calculate the initial activity, in becquerels, of the sample.