Molecules will try to adopt the most stable conformation that minimizes strain. For cyclohexane, C 6 H 12, this would be the chair conformation. Letâs see why. If cyclohexane was planar, its structure would look like the picture to the left.
CPAP mask â There are many types of C-PAP masks. There are masks that just cover the nose (nasal cpap mask), and masks that cover just the mouth (oral masks), and of course, nasal-oral masks. There are also masks that are attached to oral appliance mouth devices.
You use CPAP at home every night while you sleep. The CPAP machine will have one of the following: 1  A mask that covers your nose and mouth.  A mask that covers your nose only-called nasal continuous positive airway pressure, or NCPAP (this type of mask is most common).