A solution is 40.0% by volume benzene (C6H6, mm = 78 g/mole) in carbon tetrachloride (CCl4, mm = 154 g/mole) at 20°C. The vapor pressure of pure benzene at this temperature is 74.61 mmHg and its density is 0.88 g/cm3; the vapor pressure of pure carbon tetrachloride is 91.32 mmHg and its density is 1.59 g/cm3. If this solution is ideal, its total vapor pressure at 20°C is

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible? a. attractive forces between gas particles are negligible because the particles of an ideal gas are moving so quickly. b. collisions between gas particles are elastic; there is no net gain or loss of kinetic energy. c. gases consist of a large number of small particles, with a lot of space between the particles. d. gas particles are in constant, random motion, and higher kinetic energy means faster movement.

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change