Calculate either [h3o+] or [oh−] for each of the solutions at 25 °c. solution a: [oh−]=3.27×10−7 m solution a: [h3o+]= m solution b: [h3o+]=7.69×10−9 m solution b: [oh−]= m solution c: [h3o+]=0.000681 m solution c: [oh−]= m which of these solutions are basic at 25 °c? solution c: [h3o+]=0.000681 m solution a: [oh−]=3.27×10−7 m solution b: [h3o+]=7.69×10−9 m

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

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.

Chromium(iii) sulfate is a transition metal compound containing the metal chromium and the polyatomic ion sulfate. the oxidation state of chromium in this compound is , and the chemical formula of the compound is ( ) . reset next