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September 2, 2014

September 2, 2014

Posted by **susie** on Thursday, October 22, 2009 at 12:03pm.

- general chemistry -
**GK**, Friday, October 23, 2009 at 7:20pmLet the initial and final concentrations be Co and Ct.

To find k:

ln(Ct/Co)=-kt

ln(0.5) = -k(410s)

k = ____?

To find the concentration at (4)(410s), use the same equation:

ln(Ct/Co)=-kt

Use the value of k from the first part, and t = 4x410=1640s, then solve for for Ct.

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