A First-Order Reaction Has a Half-Life of 20

question 34

Multiple Choice

A first-order reaction has a half-life of 20.0 minutes. Starting with 1.00 × 10²⁰ molecules of reactant at time t = 0, how many molecules remain unreacted after 100.0 minutes?

• A) 1.00 × 10⁴ molecules
• B) 2.00 × 10¹⁹ molecules
• C) 3.20 × 10¹⁶ molecules
• D) 5.00 × 10²⁰ molecules
• E) none of the above

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Definitions:

ERP System

Enterprise Resource Planning System, a suite of integrated applications that an organization uses to manage core business processes.

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Various categories of documents that present and analyze information, including statistical, research, and progress reports.

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ERP Systems

Enterprise Resource Planning systems that integrate core business processes such as finance, HR, manufacturing, and supply chain into a single system.