The vapor pressure of liquid hexane, C6H14, is 40.0 mm Hg at 271 K. A sample of C6H14 is placed in a closed, evacuated container of constant volume at a temperature of 401 K. It is found that all of the C6H14 is in the vapor phase and that the pressure is 67.0 mm Hg. If the temperature in the container is reduced to 271 K, which of the following statements are correct? a. Some of the vapor initially present will condense.
b. Liquid hexane will be present.
c. No condensation will occur.
d. The pressure in the container will be 100. mm Hg.
e. Only hexane vapor will be present

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.