× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
New Topic  
Vika123 Vika123
wrote...
Posts: 1
Rep: 0 0
6 years ago
At 500 ∘C, cyclopropane (C3H6) rearranges to propene (CH3−CH=CH2). The reaction is first order, and the rate constant is 6.7×10−4s−1. If the initial concentration of C3H6 is 4.50×10−2 M .

a) What is the half-life (in minutes) of this reaction?
b) How many minutes will it take for the concentration of cyclopropane to drop to 6.25% of its initial value?
Read 998 times
1 Reply

Related Topics

Replies
wrote...
#1
Educator
6 years ago
Hi! Good question. Here's what I know:

K1 = 0.693/t1/2

t1/2 = 0.693/6.7*10^-4

t1/2 = 1034.32 sec.

b)

K1 = 2.303/t log(initial/final)

6.7 *10^-4 = 2.303/t log(100/12.5)

time = 3104.203 sec

time = 51.736 min.
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1278 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Related Images
  
 245
  
 5487
  
 6656
Your Opinion
What's your favorite funny biology word?
Votes: 328
Previous poll results: Do you trust social media networks with protecting your privacy?