Determine the boiling point of water when the atmospheric pressure is 70 kPa.

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

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.

Draw a line graph showing the relationship between temperature in kelvin as a function of kinetic energy.