Vocabulary Quizs: Stoichiometry

Mole ratio

• Ratio of substances in a chemical reaction that can be used as a conversion factor

• The amount of a substance in grams

• The total number of molecules in a reaction

• The ratio of reactants to products in a balanced equation

Theoretical yield

• The maximum amount of product that could be made from a given amount of reactant

• The actual amount of product obtained from a reaction

• The amount of reactant that is consumed in a reaction

• The amount of product that is expected based on stoichiometry

Excess reactant

• The reactant that isn’t completely used up in the reaction

• The reactant that is completely consumed in the reaction

• The reactant that is present in a smaller amount than needed

• The reactant that does not participate in the reaction

Mole

• Unit of measurement for the amount of a substance

• A type of chemical reaction

• A unit of mass

• A measure of temperature

Stoichiometry

• A method for measuring temperature in reactions

• A way to describe quantities in chemical reactions

• A technique for balancing chemical equations

• A process for separating mixtures

Actual yield

• The theoretical amount of product expected from a reaction

• The measured amount of product actually made from a reaction

• The amount of reactants used in a reaction

• The amount of product that could be produced under perfect conditions

Avogadro’s number

• 6.022 x 10^23; the number of particles in 1 mole of a substance

• 3.014 x 10^23; the number of atoms in a molecule

• 1.602 x 10^-19; the charge of a single electron

• 9.109 x 10^-31; the mass of a proton in kilograms

Percent composition

• Percentage (based on mass) of each element in a compound

• The total mass of a compound divided by the number of elements

• The ratio of the mass of one element to the total mass of the compound

• The mass of a compound expressed as a percentage of its molecular weight

Formula mass

• The sum of the average atomic masses of a compound’s elements (measured in amu)

• The total number of molecules in a compound

• The weight of a single atom in grams

• The mass of a compound in kilograms

Molar mass

• The mass of one mole of pure substance (measured in g/mol)

• The weight of an atom in atomic mass units (amu)

• The total mass of a compound divided by the number of molecules

• The mass of a solution per unit volume (g/L)