Definition
Mole
6.02x1023
the amounts in moles of any two compounds involved in a chemical reaction.
Mole ratio
Molecules
a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
he basic unit of a chemical element.
Atoms
reactant
a substance that takes part in and undergoes change during a reaction.
Product
the species formed from chemical reactions.
a chemical reaction with a greater amount than necessary to react completely with the limiting reactant.
Excess reactant
Molar Mass
A chemical compound
The percentage by mass of each element in a compound.
Percent Composition
Limiting reactant/reagent
the substance that is totally consumed when the chemical reaction is completed.
percent yield
the percent ratio of actual yield to the theoretical yield.
a unit of mass used to express atomic and molecular weights, equal to one-twelfth of the mass of an atom of carbon-12.
atomic mass units
chemical reaction
a process that involves rearrangement of the molecular or ionic structure of a substance.
a compound, typically a crystalline one, in which water molecules are chemically bound to another compound or an element.
hydrate
Avogadro’s number
the number of atoms or molecules in one mole of a substance, equal to 6.023 × 1023.
theoretical yield
the quantity of a product obtained from the complete conversion of the limiting reactant in a chemical reaction
the volume occupied by one mole of a substance at a given temperature and pressure.
Molar volume
Molecule Formula
the number of atoms of each of the elements present in one molecule of a specific compound.
the amount of product that could be obtained from a reaction if all of the reactant converted to product.
actual yield
Avogadro's law
a law stating that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules.
representative particle
the smallest unit of a substance that can be broken down without altering the composition.
the abbreviation for Standard Temperature and Pressure.
STP
formula mass
the sum of the atomic weights of the atoms in the empirical formula of the compound.
catalyst
Empirical Formula
a formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms.