In one process, 5.85 kg of CaF2 is treated with an excess of H2SO4 and yields 2.55 kg of HF. Calculate the percent yield of HF.

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.

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

Rays from the sun are not considered matter true or false