20 POINTS HELP ASAP The air we breathe is mostly a mixture of oxygen and hydrogen. How do air molecules change above 100 km?

The electrically charged ions in the ionosphere creates turbulence.
Water vapor condenses from the cold air.
Gases are no longer evenly mixed but layered.
Meteors burn in Earth's atmosphere.

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Calculate - analysis of compound composed of iron and oxygen yields 174.86 of fe and 75.14g of o. what is the empirical formula for this compound?

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.