When Oxygen has a -2 charge, it has two more A. Electrons
B. Protons
C. Neutrons
D. Atomic mass

Energy is released during which phase changes? check all that apply. boiling condensing depositing freezing melting subliming

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

The small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is a solid. it is a chemically inert, highly porous, amorphous form of sio2. because water vapor readily adsorbs onto the surface of silica gel, it acts as a desiccant. despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided you should be able to make an educated guess about the thermodynamic characteristics of the process. predict the signs for δg, δh, and δs for the adsorption of water.