chemistry Chemistry is the scientific study of the properties and behavior of matter. It is a physical science within the natural sciences that studies the chemical elements that make up matter and chemical compound, compounds made of atoms, molecules a ...

, a mole map (also called a mole road map or stoichiometric map) is a graphical representation of the relationships between the mole,

molar mass In chemistry, the molar mass () (sometimes called molecular weight or formula weight, but see related quantities for usage) of a chemical substance ( element or compound) is defined as the ratio between the mass () and the amount of substance ...

, number of

particle In the physical sciences, a particle (or corpuscle in older texts) is a small localized object which can be described by several physical or chemical properties, such as volume, density, or mass. They vary greatly in size or quantity, from s ...

s (atoms, molecules, ions),

volume Volume is a measure of regions in three-dimensional space. It is often quantified numerically using SI derived units (such as the cubic metre and litre) or by various imperial or US customary units (such as the gallon, quart, cubic inch) ...

for gases at standard temperature and pressure (STP), and coefficients from balanced chemical equations. Mole maps are widely used in teaching basic principles of

stoichiometry Stoichiometry () is the relationships between the masses of reactants and Product (chemistry), products before, during, and following chemical reactions. Stoichiometry is based on the law of conservation of mass; the total mass of reactants must ...

and

unit conversion Conversion of units is the conversion of the unit of measurement in which a quantity is expressed, typically through a multiplicative conversion factor that changes the unit without changing the quantity. This is also often loosely taken to incl ...

undergraduate Undergraduate education is education conducted after secondary education and before postgraduate education, usually in a college or university. It typically includes all postsecondary programs up to the level of a bachelor's degree. For example, ...

-level and high school chemistry courses.

Structure

A mole map typically illustrates the following core relationships: * Moles to mass: Using the

(g/mol) to convert between moles and grams. * Moles to particles: Using Avogadro's number (6.022 × 10²³ particles/mol) to convert between moles and number of particles. * Moles to volume (gases): At

STP STP may refer to: Places * São Tomé and Príncipe (ISO 3166-1 alpha-3 code, IOC country code, and FIFA country code STP) * St Pancras railway station (National Rail code STP) * St. Paul Downtown Airport (IATA airport code STP) in Saint Paul, Mi ...

, 1 mole of any ideal gas occupies 22.4 liters. * Mole ratios: Coefficients in balanced chemical equations provide ratios for converting between moles of reactants and products. The map often features arrows or pathways guiding the user between these units based on known information and desired quantities.{{Cite book , last1=Gilleland , first1=Martha J. , last2=Williams , first2=Rebecca , url=https://books.google.com/books?id=HjLu5pQge28C , title=Introduction to Chemistry , date=1986 , publisher=West Publishing Company , isbn=978-0-314-96991-0 , pages=106–120 , language=en

References

Stoichiometry Chemical quantities Chemistry education