# Chemistry (Grades 9–12) Subtest 1

## Subarea III. Stoichiometry

0007
Understand the mole concept.

- demonstrating knowledge of the mole concept
- calculating the concentrations of solutions in terms of molarity, molality, percent by mass, and mole fraction
- applying the mole concept to solve problems involving molar mass, percent composition, and empirical and molecular formulas

0008
Understand stoichiometry.

- demonstrating the ability to interpret chemical notation; balance chemical equations, including oxidation-reduction equations; and recognize net ionic equations
- solving stoichiometric problems involving moles, mass, volume, and energy, including problems with limiting reactants
- calculating the percent yield for given chemical reactions