What two substance are found in the greatest abundance among the major salts dissolved in sea water?

potassium and iron
nitrogen and chlorine
sodium and chlorine
magnesium and potassium

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Atruck driver is attempting to deliver some furniture. first, he travels 8 km east, and then he turns around and travels 3 km west. finally, he turns again and travels 13 km to his destination. what is the drivers total displacement?

Consider an ideal gas at 27.0 degrees celsius and 1.00 atmosphere pressure. imagine the molecules to be uniformly spaced, with each molecule at the center of a small cube. what is the length l of an edge of each small cube if adjacent cubes touch but don't overlap?