6.1: The Mole and Avogadro’s Number A mole is \(6.022×10^{23}\) things. 6.2: Gram—Mole Conversions It is possible to convert between moles of material and mass of material. 6.3: Mole Relationships and Chemical Equations It is possible to convert between moles of material and mass of material. 6.4: Mass Relationships and Chemical Equations The balanced chemical reaction can be used to determine molar relationships between substances. 6.5: Limiting Reagent and Percent Yield When there is not enough of one reactant in a chemical reaction, the reaction stops abruptly. To figure out the amount of product produced, it must be determined reactant will limit the chemical reaction (the limiting reagent) and which reactant is in excess (the excess reagent). One way of finding the limiting reagent is by calculating the amount of product that can be formed by each reactant; the one that produces less product is the limiting reagent.