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anonymous

  • one year ago

Will fan and medal if you answer right 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? 2.7 × 10-3 2.7 × 10-3 M-1s-1 7.2 × 105 M-1s-1 2.7 × 10-4 M-1s-1

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  1. Vocaloid
    • one year ago
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    plug in 2.7 * 10^-5 for rate, and 0.1 for A, then solve for k

  2. anonymous
    • one year ago
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    I got 2.7 8 10^-6

  3. anonymous
    • one year ago
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    Which is not even in the answer choice

  4. Vocaloid
    • one year ago
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    check your math again...

  5. Vocaloid
    • one year ago
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    (2.7*10^-5)/(0.1^2) = ?

  6. anonymous
    • one year ago
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    No Clue. I'm NOT this advanced in math yet

  7. anonymous
    • one year ago
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    oki let me try

  8. anonymous
    • one year ago
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    i got .0027, idk anymore

  9. Vocaloid
    • one year ago
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    right, 0.0027, now convert to scientific notation

  10. anonymous
    • one year ago
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    how do you convert to scientific notation on calculator

  11. Vocaloid
    • one year ago
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    uh, I'm not sure you can do that on a calculator 0.0027 = 2.7 * 10 ^ x find x

  12. anonymous
    • one year ago
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    10^-4

  13. anonymous
    • one year ago
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    ?

  14. Vocaloid
    • one year ago
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    not quite, try again... how many places do you have to move the decimal point to get from 0.0027 to 2.7?

  15. anonymous
    • one year ago
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    3

  16. Vocaloid
    • one year ago
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    right! so, 0.0027 = 2.7 * 10^(-3) now, the units of k are M-1s-1 so our answer becomes 2.7 * 10^(-3) M-1s-1

  17. anonymous
    • one year ago
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    Thank you

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