College-level or AP chemists use phthalic anhydride to synthesize two different polyesters, one linear and one cross-linked in structure. A detailed materials list and well-written procedures are provided on a lab sheet. Learners write...

In this chemical equations learning exercise, students learn to balance chemical equations by counting the number of atoms of each element in the products and reactants and making them equal. This learning exercise has 5 problems to solve.

In this water learning exercise, students compare and contrast elements and compounds. Students define chemical symbols, chemical formulas, and chemical properties. This learning exercise has 19 short answer questions.