Stoichiometry ANACHEM

• Stoichiometry is defined as the mass relationships among reacting chemical species
• An empirical formula gives the simplest whole-number ratio of atoms in a chemical compound, while a molecular formula specifies the number of atoms in a molecule
• Two or more substances may have the same empirical formula but different molecular formulas
• The empirical formula is obtained from the percent composition of a compound, while the molecular formula requires knowledge of the molar mass of the species
• A structural formula provides additional information about the arrangement of atoms in a molecule
• Subscripts and coefficients in chemical equations give different information
• Types of reactions include combination reactions and decomposition reactions
• Stoichiometric calculations involve determining the quantities of reactants and products in chemical reactions
• In stoichiometric calculations, the balanced equation reveals the stoichiometric factors between reactants and products