A 952 * 10¯⁵ Mol Sample of Rubidium-86 Emits 8 $\beta$

question 90

Multiple Choice

A 9.52 * 10¯⁵ mol sample of rubidium-86 emits 8.87 * 10¹⁶ $\beta$ particles in one hour. What is the half-life of rubidium-86?

• A) 2.23 *10¯³ h
• B) 1.55 *10¯³ h
• C) 448 h
• D) 645 h
• E) None of these choices is correct.

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Definitions:

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