Acolligative property, is the difference between the freezing temperature of a pure solvent and the freezing point of a solution of a nonelectrolyte in the same solvent.

molar freezing-point constant

molal melting-point constant

molal boiling-point constant

boiling-point elevation

freezing-point depression

What is the temperature of one mole of helium gas at stp?

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

Heat is the total potential energy of a substance that can be transferred. true false