A Reactant R Is Being Consumed in a First-Order Reaction

question 64

Multiple Choice

A reactant R is being consumed in a first-order reaction. What fraction of the initial R is consumed in 4.0 half-lives?

• A)0.94
• B)0.87
• C)0.75
• D)0.13
• E)0.063

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Definitions:

Prosthesis

An artificial device used to replace a missing body part, such as a limb, tooth, eye, or heart valve.

Hearing Loss

A partial or total inability to hear sounds in one or both ears.

Cornea

The transparent front part of the eye that covers the iris, pupil, and anterior chamber, contributing most of the eye's focusing power.

Anterior

Pertaining to or situated toward the front of the body; opposite of posterior.