Introduction to Chemistry: Reactions and Ratios

Duke's introductory chemistry course connects the language of atoms and reactions to numerical reasoning. The important transition is from recognizing a chemical equation to understanding what quantities it describes. This foundation helps later topics feel less like a collection of rules and more like a consistent way to account for matter.

What you will learn

• Interpret foundational chemical terminology
• Understand atoms and chemical formulas
• Reason about reactions and balanced relationships
• Use ratios in chemical calculations

Who this suits

Useful for a beginner or a learner returning to chemistry after a long gap. Comfort with algebra, units, and proportional reasoning helps. Spend time on worked examples before advancing, since later calculations often depend on distinctions introduced in the first lessons.

Before you enroll

An online conceptual course cannot replace supervised laboratory experience. Keep mathematical manipulation connected to a physical interpretation rather than treating units as decoration. For formal study, compare the syllabus with the requirements of the class or examination you are preparing for.

Coursera's full assessment and certificate experience follows current enrollment terms. Preview, trial, or financial-aid options may differ by learner and region.

Put it into practice

For one balanced reaction, predict how changing the available amount of a reactant limits the amount of product that can form.

Source and review

This overview is based on the provider's published information, checked on 11 October 2026. It is an editorial assessment, not a claim that we completed the resource. Time filters are approximate study ranges; projects and exercises can take longer.

View the curriculum and current access options at Coursera.

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