If the AH yap of acetone is 31.3 kJ/ mol and the ASvap of acetone is 95 J/mol K, what
is the AGvap at room temperature (25°C, 298K)? Does this substance boil?

a) AG vap is negative, which means that it doesn't
boil at this temperature.

b) AG vap is negative, which means that it does boil
at this temperature.

c) AGvap is positive, which means that it doesn't
boil at this temperature.

d) AG vap is positive, which means that it does boil
at this temperature.

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.