If the concentration of a solution is expressed in mol/L, it is called the of the solution and has the symbol M. These units denote the concentration of a solution as the amount (moles or grams) of solute dissolved in a liter of .

Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products