Consider the following reversable reaction c(s)+o2(g) arrow thing, forgot what its called co2(g). what is the equilibrium constant expression for the given system?

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.

What is calcium oxide+diphosphorus pentoxide--> calcium phosphate balanced

The half-life of a certain element is 100 days. how many half-lives will it be before only one eighth of this elementremains?