True or false only ocean waves have troughs and crest

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

Which of the following words describe the reality that the universe looks the same from various perspective