7. If the relative humidity is 12%, and then the temperature increases and humidity then decreases, there will be precipitation? Why or why not?

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

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.

Calculate the concentration of all species in a 0.165 m solution of h2co3.