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A Certain Substance Has a Half-Life of 5

question 23

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A certain substance has a half-life of 5.0 hours.How many nuclei of the substance are required to give an initial activity of 6.0 μCi? 1 Ci = 3.7 × A certain substance has a half-life of 5.0 hours.How many nuclei of the substance are required to give an initial activity of 6.0 μCi? 1 Ci = 3.7 ×   Bq. A)  5.8 ×   B)  8.5 ×   C)  6.3 ×   D)  3.2 ×   E)  2.4 ×  Bq.


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