Empirical and Molecular Formula Practice
- Grades
- Grades 8–12
- File type
- Microsoft Word
- Subject
- Chemistry, Science
- Topic
- Empirical Formula, Molecular Formula
- Resource types
- Activities
From the author
About this resource
This resource includes 20 problems to practice empirical and molecular formula calculations.
The answers and solutions are included, though the document can be edited to meet your lesson's needs.
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In the classroom
Teaching tips & learning objectives
Learning objectives
Calculate an empirical formula from percent or mass composition
Determine a molecular formula from a molar mass and an empirical formula or percent composition
Teaching tips
Students need atomic masses from a periodic table to work the mole-ratio and molar-mass steps.
Skills covered
Mole ratios — converting composition data to the simplest whole-number ratio
Molar mass reasoning — scaling an empirical formula up to the molecular formula
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Resource details
Concepts & topics
Core concepts
Core concepts
Empirical formula
Molecular formula
Percent composition
Topics
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