What is made when certain wavelengths of light, or colors, are given off by hot gases and can be thought of like a fingerprint for elements? constellations

nebulae

supernovas

emission lines

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.

Is this correct if not can u correct me

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.