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5 Written questions

5 Matching questions

  1. homogeneous
  2. torr
  3. hydrate
  4. Graham's law of effusion
  5. vapor-pressure curve
  1. a A graph generated by plotting the temperature of a liquid on the x-axis and its vapor pressure on the y-axis. Any point on the curve represents an equilibrium between the vapor and the liquid.
  2. b A solid that contains water molecules as part of its crystalline structure.
  3. c The rates of effusion of two gases at the same temperature and pressure are inversely proportional to the square roots of their densities or molar masses.
  4. d A unit of pressure (1 torr = 1 mm Hg).
  5. e Mater that has uniform properties throughout.

5 Multiple choice questions

  1. The ability of a solute to dissolve in a solvent.
  2. A chemical substance entering into a chemical reaction.
  3. In the VSEPR model, an arrangement where the pairs of electrons are arranged 180 degrees apart.
  4. A state of matter in which the particles move about freely while the substance retains a definite volume; thus, liquids flow and take the shape of their containers.
  5. Number that appears below the line and to the right of a symbol of an element.

5 True/False questions

  1. STP (Standard Temperature and Pressure)0 degrees C (273 K) and 1 atm (760 torr).


  2. protonA subatomic particle found in the nucleus of the atom that caries a positive electrical charge and a mass of about 1 amu.


  3. wavelengthIonic compounds of cations and anions.


  4. liter (L)SI unit of volume.


  5. weightA measure of the earth's gravitational attraction for an object.


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