Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

S

  • 3 years ago

In the first order reaction A-. products [A]= 0.826M initially and 0.634 M after 15.0 min. What will [A] be after 2.7 h? ( t1/2= 39.3 min)

  • This Question is Closed
  1. aaronq
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    find the decay constant, k: \[t _{1/2}=\frac{ \ln2 }{ k }\] then use the exponential decay formula: \[A=A _{0}e ^{-kt}\]

  2. S
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    somehow this answer didn't work for me

  3. aaronq
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    did you convert 2.7 hours to minutes?

  4. S
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    162 min, right?

  5. aaronq
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    i got 0.0474 ...0.05 M

  6. S
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Worked ! probably i did something wrong in calculations. Did you use the same formula ?

  7. aaronq
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yep, i did

  8. S
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Thank you!

  9. aaronq
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    no prob!

  10. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy