Instructions: select the correct answer. an electromagnet is a device in which moving electric charges (current) in a coil of wire create a magnet. what’s one advantage of using electromagnets in devices? a. electromagnets have a strong, constant magnetic field. b. electromagnets are more powerful than permanent magnets. c. electromagnets don’t need a source of electricity to work. d. electromagnets can easily be turned on and off.

What is the overall order of reaction for rate = k[no]2[o2]

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.

What are the two largest greenhouse gases