4. * All of the following are found in vehicle exhausts except for one. Which one?
a) Lead
b) Carbon monoxide c) Carbon dioxide d) Hydrogen
A
B
С
D​

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.

William has eight more nickels than dimes in his pocket for a total of $2.50. which equation could be used to determine the number of x dimes in his pocket?

Why must sample spots be above the solvent in paper chromatography