Question
Promethium- 147 has been used in luminous paint for dials. The half-life of this isotope is $2.5 \mathrm{y} .$ What is the decay constant (in /s)?
Step 1
1 year = 365.25 days (accounting for leap years) 1 day = 24 hours 1 hour = 3600 seconds 2.5 years = 2.5 * 365.25 * 24 * 3600 = 78894000 seconds Show more…
Show all steps
Your feedback will help us improve your experience
Bin Chen and 56 other Chemistry 102 educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
The $\frac{32 \mathrm{P}}{15} \mathrm{P}$ isotope of phosphorus has a half-life of 14.28 days. What is its decay constant in units of $\mathrm{s}^{-1} ?$
An isotope has a half-life of 17.40 days. What is its decay constant in units of s-1?
The isotope 224^88 Ra of radium has a decay constant of 2.19x10^-6 s^-1. What is the half-life (in days) of this isotope? ________ days
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD