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Specific conductance measures how well a particular solution conducts electricity, whereas molar conductance measures how much a particular substance contributes to the conductivity of the solution. Specific conductance is measured in siemens per meter (S/m), while molar conductivity is measured in siemens square centimeters per mole (S cm2/mol). Molar conductance is a useful measure of the dissociation of a substance in a solution because it depends on the concentration of the solution and the degree of dissociation.