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January 25, 2015

January 25, 2015

Posted by **Yeneta** on Wednesday, June 6, 2012 at 11:03am.

- Chemistry -
**DrBob222**, Wednesday, June 6, 2012 at 1:53pmFirst order.

1/2 is gone in two hours. Another 1/2 is gone in another two hours.

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