A 785 *10¯⁵ Mol Sample of Copper-61 Emits 1

question 58

Multiple Choice

A 7.85 *10¯⁵ mol sample of copper-61 emits 1.47 *10¹⁹ positrons in 90.0 minutes. What is the decay constant for copper-61?

• A) 0.00230 h¯¹
• B) 0.00346 h¯¹
• C) 0.207 h¯¹
• D) 0.311 h¯¹
• E) None of these choices is correct.

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Definitions:

Self-Reported Emotions

Emotions that individuals acknowledge and describe about themselves, typically through verbal or written reports.

Facial Expressions

Visible changes in the face that communicate someone's emotions to others.

Cultural Influences

The impact of societal norms, values, beliefs, and practices on the behavior and attitudes of individuals within that society.

Homeostasis

The self-regulating process by which biological systems tend to maintain stability while adjusting to conditions that are optimal for survival.