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Phenethicillin degrades at pH 7.0 in aqueous solution at 25°C by first-order kinetics with a half-life of 515 h. How many hou
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Phene thicitin defrades tiat ordur neauim halt -ite 51s h Fox Fiast rd er reaction O.693 월 = halt-uite 1 xanchion K ate Cons

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