This quantity is assumed to be close to zero when deriving the Debye–Huckel (“duh-BYE HUCK-ull”) equation. The reciprocal of this quantity appears on the x-axis of a Lineweaver–Burk plot. Because this quantity equals absorbance divided by the product of path length and extinction coefficient by Beer’s law, this quantity is measured using spectrophotometry. (10[2]-5[1])Either partial pressure or this quantity is raised to the power of stoichiometric coefficients to define the equilibrium constant. This quantity for an analyte can (10[1])be determined using titration. For 10 points, name this quantity which can be measured in molarity or molality, (10[2])the amount of a solute dissolved in a solution. ■END■ (10[1])