Substances with the same empirical and molecular formula must be differentiated by their structural formula. Part two in a series of 36 has pupils using chemical formulas to calculate how much of a compound is present in a given quantity. They calculate empirical formulas of given compounds and begin to apply this knowledge to chemical formulas through stoichiometry. 

Concepts

empirical formulas, molecular formulas, moles, mass, volume

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Additional Tags

science

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Instructional Ideas

• Break the activity into parts and the classes into groups; have each group work on same section for a given amount of time and then discuss
• Allow those who complete work correctly peer tutor other groups to assist them

Classroom Considerations

• Level of knowledge to complete this activity best fits high schoolers with some chemistry background

Pros

• The activity ends with a terminal exercise of 15 calculations to show what students learned
• Lesson provides keys for all in-text questions

Cons

• None

Common Core

RST.9-10.2