A Certain Substance Has a Half-Life of 5

question 29

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 × Bq.

• A) 5.8 × 10⁹
• B) 8.5 × 10⁸
• C) 6.3 × 10⁸
• D) 3.2 × 10⁹
• E) 2.4 × 10⁹

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Definitions:

State Of Ferment

A period of unrest or disorder, often characterized by change and uncertainty.

Stasis

A state of stability or equilibrium where there is no movement, progression, or change, often used to describe situations where progress seems halted.

Inertia

Inertia is the resistance of any physical object to any change in its state of motion, including changes to its speed and direction.

Dyadic Processes

Interactions and exchanges between two individuals, particularly focusing on communication, influence, and relational dynamics.