Final answer:
The legal limit of alcohol for someone over 21 in the state of Alabama is: .08% Blood Alcohol Concentration (BAC) (Option B). It should be consumed in moderation and measured by methods such as a Breathalyzer, considering the body metabolizes alcohol at about 0.15 mg/dL per hour.
Step-by-step explanation:
The legal limit for alcohol in Alabama for individuals over 21 years of age is .08% BAC. This limit is consistent with the majority of United States jurisdictions.
It is important to note that being at or above this level of BAC and operating a vehicle would be considered illegal and qualifies as Driving Under the Influence (DUI).
The body metabolizes alcohol at a rate of approximately 0.15 mg/dL per hour, and understanding this rate is crucial for individuals who choose to drink and then assess whether they are within the legal limits to drive.
For safety and health, if alcohol is consumed, it should be in moderation and only by adults of legal drinking age.
Additionally, a Breathalyzer can be used to measure BAC, and the results from such tests are often used to enforce DUI laws.
The specific reaction that takes place when using a Breathalyzer is the oxidation of ethanol by the dichromate ion.
Hence, the correct answer is .08% (Option B).