The rate of chemical reactions is commonly measured in moles per liter per second (mol/L/s), which indicates how quickly reactants are converted into products in a reaction. This unit reflects the concentration change over time, providing insight into reaction kinetics. Factors influencing this rate include temperature, pressure, concentration of reactants, and the presence of catalysts, all of which can accelerate or decelerate the reaction process. Understanding these rates is crucial in fields like chemistry, biology, and environmental science.