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BJU Chemistry Ch 9

Bob Jones Chemistry - Chapter 9

TermDefinition
actual yield The measured amount of product at the end of a reaction. It is normally expressed in grams of the product.
Avogadro's number A law of gas behavior stating that the volume of a gas, maintained at a constant temperature and pressure, is directly proportional to the number of moles of the gas.
empirical formula A formula that tells the types of atoms that are present in a compound and the simplest whole number ratio between the atoms.
excess reactant A reactant remaining unchanged at the end of a reaction because another reactant limited the yield of product.
law of definite composition A law stating that every compound is formed of elements combined in mass ratios that are unique for that compound.
limiting reactant A reactant that is used up first before the other reactants in a reaction, preventing more products from forming.
molar mass The mass of one mole of any pure substance. It is expressed in grams per mole (g/mol).
mole
molecular formula
mole ratio The ratio between the moles of one substance and the moles of another substance as indicated by the coefficients in a balanced equation; also the ratio between elements within a compound as indicated by the subscripts in a balanced equation.
percent composition A percentage that gives the relative amount (based on mass) of each element present in a compound.
percent yield The percentage of the theoretical yield that was actually produced.
stoichiometry The measurement and calculation of the mass and molar relationships between reactants and products in chemical reactions.
structural formula A formula that shows the types of atoms involved, the exact composition of a molecule, and the arrangement of chemical bonds.
theoretical yield The maximum amount of product that could be created from a given amount of reactant. It is normally expressed in grams of the product.
Created by: heidio