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.
Your doctor wants you on a CPAP machine to help your sleep apnea. You might worry youâll be tied to a noisy gadget all night with tubes there, a mask here, and straps going every which way. It can seem overwhelming, says David Rapoport, MD, the director of research at the NYU Sleep Disorders Center.