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A Certain Substance Has a Half-Life of 5

Question 111

Multiple Choice

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 × nuclei B) 8.5 × nuclei C) 6.3 × nuclei D) 3.2 × nuclei E) 2.4 × nuclei
Bq)


A) 5.8 × 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 × nuclei B) 8.5 × nuclei C) 6.3 × nuclei D) 3.2 × nuclei E) 2.4 × nuclei nuclei
B) 8.5 × 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 × nuclei B) 8.5 × nuclei C) 6.3 × nuclei D) 3.2 × nuclei E) 2.4 × nuclei nuclei
C) 6.3 × 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 × nuclei B) 8.5 × nuclei C) 6.3 × nuclei D) 3.2 × nuclei E) 2.4 × nuclei nuclei
D) 3.2 × 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 × nuclei B) 8.5 × nuclei C) 6.3 × nuclei D) 3.2 × nuclei E) 2.4 × nuclei nuclei
E) 2.4 × 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 × nuclei B) 8.5 × nuclei C) 6.3 × nuclei D) 3.2 × nuclei E) 2.4 × nuclei nuclei

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