Top Posters
Since Sunday
r
7
c
6
5
n
5
S
4
M
4
r
4
1
4
s
4
s
4
n
4
s
4
Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
New Topic  
einsteindude einsteindude
wrote...
Go to Answer
Posts: 5058
Rep: 29 1
9 years ago
Krypton-79 has a half-life of 35 hours. How many half-lives have passed after 105 hours?
A) 1 half-life
B) 2 half-lives
C) 3 half-lives
D) 4 half-lives
E) 5 half-lives
Textbook 
Conceptual Physical Science

Conceptual Physical Science


Edition: 6th
Authors:
Read 1137 times
1 Reply
Replies
Answer accepted by topic starter
f_zah1f_zah1
wrote...
#1
Top Poster
Posts: 10774
Rep: 1064 3
9 years ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
1

Related Topics
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1460 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 353
  
 260
  
 320
Your Opinion
Which is the best fuel for late night cramming?
Votes: 231
Previous poll results: Does a gender wage gap exist in America?