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.
The treatment is done using a CPAP machine, which consists of three main parts: 1  Mask that fits over your nose -- or your nose and mouth -- and is held in place with straps while you sleep. 2  Motor that blows air. 3  Large tube called a cannula that connects the motor to the mask.