Determine the empirical formula of a compound containing 63.50% silver, 8.25% nitrogen, & 28.25% oxygen.
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Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

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.

Which of the following molecules is polar? c3h7oh c2h5cooh