all electromagnetic radiation: A. can travel through empty space B. travels at the same speed in a vacuum C. consists of photons D. all of the above

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

The molality of calcium chloride (cacl2) in an aqueous solution is 2.46 m. what is mole fraction of the solute?