Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Noemi95

The rate law for a hypothetical reaction is rate = k [A]^2. When the concentration is 0.10 moles/liter, the rate is 2.7 × 10^-5 M*s^-1. What is the value of k?

  • 11 months ago
  • 11 months ago

  • This Question is Closed
  1. timo86m
    Best Response
    You've already chosen the best response.
    Medals 0

    rate = k [A]^2 just plug in 2.7*10^(-5) = k*.1^2 ^rate ^.1 molles/liter maybe and then solve for k :)

    • 11 months ago
  2. timo86m
    Best Response
    You've already chosen the best response.
    Medals 0

    k = 0.27e-2

    • 11 months ago
  3. Noemi95
    Best Response
    You've already chosen the best response.
    Medals 1

    umhm so wait... would it be the same as 2.7*10^-3M^-1s^-1?

    • 11 months ago
  4. timo86m
    Best Response
    You've already chosen the best response.
    Medals 0

    well unites should be M*s^-1 so ( moles/liter)^2* k's units= M*s^-1

    • 11 months ago
  5. Noemi95
    Best Response
    You've already chosen the best response.
    Medals 1

    umhm alright. Thank you!

    • 11 months ago
  6. timo86m
    Best Response
    You've already chosen the best response.
    Medals 0

    is moles/liter=M?

    • 11 months ago
  7. electrokid
    Best Response
    You've already chosen the best response.
    Medals 1

    remember the unit M=mol/L \[ 2.7\times10^{-5}\,{\rm M/s}=k\times \left(0.1\,{\rm M}\right)^2\\ k=\frac{2.7\times10^{-5}}{0.01}\times \frac{{\rm M}}{\rm s\cdot M^2}\\ \boxed{k=2.7\times10^{-3}{\rm M^{-1}\cdot s^{-1}}} \] the reaction is thus, a second order reaction.

    • 11 months ago
  8. Noemi95
    Best Response
    You've already chosen the best response.
    Medals 1

    Soo, I was right? :D woho! Thanks alot electrokid!

    • 11 months ago
  9. electrokid
    Best Response
    You've already chosen the best response.
    Medals 1

    yaya. good job.

    • 11 months ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.