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vera_ewing

  • one year ago

If the decomposition reaction of 1.4 M initial hydrogen peroxide (H2O2) occurs so that after 3 minutes, 0.83 M is left, what is the rate of the reaction? A. -0.0046 M/s B. -0.012 M/s C. -0.19 M/s D. -0.0032 M/s

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  1. vera_ewing
    • one year ago
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    @rvc @sweetburger What do you guys think?

  2. rvc
    • one year ago
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    please stay with us @Vocaloid :) vera you may know the formula for the following question

  3. rvc
    • one year ago
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    could you please write down the formula @vera_ewing

  4. TrojanPoem
    • one year ago
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    −Δ[Reactants]/ Δt or Δ[Products]/Δt

  5. rvc
    • one year ago
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    \(\Large\rm Rate = Change~in~concentration~per~time\)

  6. TrojanPoem
    • one year ago
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    - (1.4 - 0.83) / 3 * 60 - initial ( 0 ) = approximately = - 0.003166 =- 0.0032 M/S Notice: In other example if there is coefficients with the reactants or products .. All these formulas are out.

  7. TrojanPoem
    • one year ago
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    @rvc, Change in concentration per time is average rate of reaction

  8. vera_ewing
    • one year ago
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    So the answer is D?

  9. TrojanPoem
    • one year ago
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    I believe so.

  10. rvc
    • one year ago
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    yep sorry for the mistake thanks

  11. vera_ewing
    • one year ago
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    Thank you! Who should I give the medal to?

  12. TrojanPoem
    • one year ago
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    No problem.

  13. TrojanPoem
    • one year ago
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    Give it to rvc

  14. vera_ewing
    • one year ago
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    How about this one?

  15. rvc
    • one year ago
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    no give it to trojan

  16. vera_ewing
    • one year ago
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    @sweetburger Help please! @rvc

  17. rvc
    • one year ago
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    do you know about the energy profile diagram?

  18. vera_ewing
    • one year ago
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    Yes

  19. rvc
    • one year ago
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    the starting of the curve is about the energy of reactants the middle part is the transition state and the latter part is the energy of products

  20. vera_ewing
    • one year ago
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    So the answer is B?

  21. rvc
    • one year ago
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    No

  22. vera_ewing
    • one year ago
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    A?

  23. rvc
    • one year ago
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    what difference do you see?

  24. rvc
    • one year ago
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    i think its C since the values are different

  25. vera_ewing
    • one year ago
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    Are you 100% sure it's C?

  26. rvc
    • one year ago
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    yes according to me its C

  27. vera_ewing
    • one year ago
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    Okay thanks! :)

  28. rvc
    • one year ago
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    :)

  29. vera_ewing
    • one year ago
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    How about this one?

  30. rvc
    • one year ago
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    The question is asking about the least amount of time Which is the smallest no from the four options?

  31. vera_ewing
    • one year ago
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    C can't be correct??

  32. rvc
    • one year ago
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    Min is greater than sec so you r right what remains next?

  33. vera_ewing
    • one year ago
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    I think the answer is A...do you agree?

  34. rvc
    • one year ago
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    Check out the unit

  35. rvc
    • one year ago
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    its in minutes

  36. vera_ewing
    • one year ago
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    Ohh so it's not A or C right?

  37. rvc
    • one year ago
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    4.48 X 10^-5= 0.0000448 s^-1

  38. vera_ewing
    • one year ago
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    So the answer is B?

  39. rvc
    • one year ago
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    yep

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