3. The following results were obtained for the analysis of phenanthrene using isotopically labeled phenanthrene as an internal standard. What is the concentration of the analyte in the sample? [phenanthrene], mM Sanalyte SIS 0.514 Envas 0.50 Biology Env 125 nme Science 0.993 2.00 1.486 3.00 2.044 4.00 2.342 sample 1.024

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Substance Abuse

Substance abuse refers to the use of illegal drugs in excessive quantities, as well as the misuse of legal substances such as prescription or over-the-counter pharmaceuticals or alcohol for purposes other than those intended. Drug addiction, also known as substance use disorder, is a disease that affects the brain and behavior of a person. It leads to a failure to control the use of any drug or prescription, legal or illegal.