Posted by **Nancy** on Wednesday, August 6, 2014 at 3:27pm.

Still can't figure this one out-- sorry for reposting, this is the last post, if someone has time to review this question and see if they can figure out how the textbook got 1.0x10^-7 seconds

Iodine combines to form I2 in liquid propane solvent with a constant of 1,5 x 10^10 L/mol. The rate is 2nd order. Since the reaction occurs quickly, a flash of light creates an I concentration of .0100M. How long will it take for 95% of the atoms to form I2?

This must use a second order rate equation, but I cannot get 1.0x10^-7 s which is the answer.

I assume 1.0x10^-7 s = seconds.

- chemistry -repost -
**DrBob222**, Wednesday, August 6, 2014 at 4:34pm
A couple of points.

1. Did you mean "occurs quickly, a flash of light creates an **I2** concn ......? so that the rate law is rate = k(I)^2 for 2I ==> I2

2. I have been unable to use this to obtain 1.0E-6 but I have close to that.

3. I will look at it again if you will post what you've done. I can't get back for about 2-3 hours from now.

## Answer This Question

## Related Questions

- science - Is sodium nitrate polar or nonpolar and how do I figure this out? ...
- math (more trig) - how could you do this problem? tinyurl 39jlf9 (sorry i cant ...
- Physics-repost, sorry, I still don't understand :( - A forearm with a mass of 1....
- Chemistry - We have been getting numerous questions like this on assignments and...
- Maths - Alright I'm doing a maths review (grade 11) and on the page, the ...
- Chemistry - Determine the unknown quantity in the following cell at 298.15 K. Pt...
- Physics repost - I apologise for reposting this question but it is still not ...
- Geometry Question plz help - Could someone please explain how to figure this out...
- Just a repost, in case the old isnt seen - sorry! I never noticed..the mass ...
- Chemistry - Hi Dr. Bob, I am quite stumped on how to figure out when chemical ...

More Related Questions