the layers of the atmosphere are determined based on air temperature, which has to do with the energy of the molecules in the air. Where does this energy originally come from?

Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)

What are the first three quantum numbers for the electrons located in subshell 2s?

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction