You are performing an experiment using 3 H (half-life = 4.50 10 3 days) labeled phenylalanine
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You are performing an experiment using 3H (half-life = 4.50 × 103 days) labeled phenylalanine in which the five aromatic hydrogens are labeled. To perform the experiment, the initial activity cannot be lower than 10.0% of the initial activity when the sample was received. How long after receiving the sample can you wait before performing the experiment?
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