A Sample of Phosphorus-32 Is Found to Have an Activity

question 71

Multiple Choice

A sample of phosphorus-32 is found to have an activity of 885 disintegrations per hour (dph) .After 25 hours the activity has decreased to 841 dph.What is the rate constant for the decay of phosphorus-32?

• A) 0.0038 hr^-1
• B) 0.0020 hr^-1
• C) 0.15 hr^-1
• D) 490 hr^-1
• E) 0.12 hr^-1

---

Definitions:

High Levels

Situations, qualities, or conditions that are significantly above the average or expected standards.

Prosperity

A state of being successful, especially in financial terms, marked by flourishing conditions and/or wealth.

Acceptance Theory

Suggests that the effectiveness of leadership or management depends on the consent and support of followers or workers.

Herzberg's Theory

A motivational theory dividing factors at work into two categories: hygiene factors, which can cause dissatisfaction, and motivators, which can create satisfaction.