The air pressure from the atmosphere measures 0.5atm at an altitude of 18,000 ft. how much pressure is this in pounds per square inch?

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp