For a First-Order Reaction, Which Expression Describes the Relationship Between

question 23

Multiple Choice

For a first-order reaction, which expression describes the relationship between the rate constant, k, and the half-life, t_1/2?

• A) t_1/2 = 2 / k
• B) t_1/2 = ln 2 / k
• C) t_1/2 = k / 2
• D) t_1/2 = ln 2 × k
• E) t_1/2 = k / ln 2

---

Definitions:

Flexion

A movement that decreases the angle between two body parts, such as bending an elbow or knee.

Extension

The movement by which the angle between two bones is increased, typically referring to limbs or joints.

Circumduction

A circular movement of a limb or eye that combines flexion, extension, abduction, and adduction.

Protraction

The act of moving a body part forward, as in pushing the shoulders or jaw forward.