Δtf = kf × m this formula relates the drop in freezing point (δtf) to the molal freezing point depression constant (kf) and the molal concentration of the solute (m). under which conditions does this formula apply? when the mass of the solvent equals 1 kg when the solute is ionic, not molecular when the solute is molecular, not ionic when the solvent is water, not other liquids

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.