The Half- Life of a First- Order Reaction Is 13

question 20

Multiple Choice

The half- life of a first- order reaction is 13 min. If the initial concentration of reactant is 0.085 M, it takes min for it to decrease to 0.055 M.

• A) 0.048
• B) 11
• C) 8.4
• D) 3.6
• E) 8.2

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Definitions:

Subcutaneous

Pertaining to under the skin, often referring to a route of medication administration.

Injection

The act of administering a liquid, such as a drug or vaccine, directly into a body tissue, often through a syringe and needle.

Angle

The figure formed by two rays, called the sides of the angle, sharing a common endpoint termed the vertex.

Retention Enema

A medical procedure involving the introduction of fluid into the rectum, which is meant to be held in for a designated period to achieve a therapeutic effect.