It Takes 42

question 42

Multiple Choice

It takes 42.0 min for the concentration of a reactant in a first-order reaction to drop from 0.45 M to 0.32 M at 25°C.How long will it take for the reaction to be 90% complete?

• A)13.0 min
• B)86.0 min
• C)137 min
• D)222 min
• E)284 min

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Definitions:

Population

The total number of individuals inhabiting a particular territory or area, often analyzed in terms of density, distribution, and growth rates.

Individuals

Single organisms of a particular species, considered separately from their population or community.

Species

A group of organisms sharing common characteristics and genetic makeup, capable of interbreeding and producing fertile offspring under natural conditions.

Basic Unit

The fundamental component or element from which a system is built or organized.