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:

Government Regulations

Rules or laws established by governments to control and guide the operations of businesses and individuals with the aim of protecting public interest.

Macroeconomics

The branch of economics dealing with the performance, structure, behavior, and decision-making of an economy as a whole, including issues like economic growth, inflation, and unemployment.

Normative Statements

Statements that express value judgments or opinions about what ought to be rather than statements of fact.

Positive Theories

Positive theories attempt to describe how the world is, focusing on factual statements and cause-effect relationships without prescribing what actions should be taken.