Top Posters
Since Sunday
1
Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
New Topic  
Whelan Whelan
wrote...
Go to Answer
Posts: 3158
Rep: 40 1
9 years ago
If the age of the Earth is 4.5 billion years and the half-life of 40K is 1.26 billion years, what percent of the Earth's original amount of 40K remains today?
A) 4.2%
B) 8.4%
C) 12%
D) 16%
Textbook 
Introductory Chemistry Essentials

Introductory Chemistry Essentials


Edition: 5th
Author:
Read 462 times
1 Reply
Replies
Answer verified by a subject expert
hbutler2hbutler2
wrote...
#1
Top Poster
Posts: 3076
Rep: 889 1
9 years ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
1
I'm a chemical engineer! Slight Smile

Related Topics

Whelan Author
wrote...

9 years ago
Brilliant ツ
nadiia
wrote...

Yesterday
This site is awesome
Lourd Jenkins
wrote...

2 hours ago
Good timing, thanks!
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  838 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 273
  
 192
  
 6326
Your Opinion
Which country would you like to visit for its food?
Votes: 263
Previous poll results: Should Ph.D.'s be addressed as doctors?