A compound exhibits a peak at 1685 cm-1 in its IR spectrum. Describe how 13C NMR can be used to identify the functional group. a. Amides have a peak around 170 ppm in 13C NMR; esters, 175 ppm
b. Esters have a peak around 175 ppm in 13C NMR; conjugated ketones, 200 ppm
c. Amides have a peak around 170 ppm in 13C NMR; conjugated ketones, 200 ppm
d. Ketones and aldehydes are indistinguishable in 13C NMR

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm

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.

The sum of the oxidation numbers in a neutral compound is always