The - 13 kcal means this reaction is (A) endothermic
(B) not likely to happen
(C) at room temperature
(D) pressure dependent
(E) exothermic

When the volume and number of particles of a gas are constant which of the following is also constant

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

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.