Which statements describe band theory? Check all that apply. Electrons all have approximately the same energy.

Electrons move among orbitals of different energies.

Electrons move freely among atoms (delocalized).

The p sub shell can hold up to 8 electrons in an atom. true or false?

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

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.