The atomic mass and abundance of cr-50 is 49.946 amu and 4.3%. the atomic mass and abundance of cr-52 is 51.941 amu and 83.8%. the atomic mass and abundance of cr-53 is 52.941 amu and 9.5%. the atomic mass and abundance of cr-54 is 53.939 amu and 2.4%. which is the average atomic mass of chromium?
a. 53.94 amu
b. 52.19 amu
c. 52.00 amu
d. 51.94 amu

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.