Frames can be made to hold the lenses in several different ways. There are three common styles: full frame, half frame, and frameless. Full frame glasses have the frame go all around the lenses. Half frames go around only half the lens; typically the frames attach to the top of the lenses and on the side near the top.
Ethanol is a monohydric primary alcohol. It melts at - 117.3Â°C and boils at 78.5Â°C. It is miscible (i.e., mixes without separation) with water in all proportions and is separated from water only with difficulty; ethanol that is completely free of water is called absolute ethanol.t is miscible (i.e., mixes without separation) with water in all proportions and is separated from water only with difficulty; ethanol that is completely free of water is called absolute ethanol.
The chemical name for ethanol is Ethyl Alcohol or Ethan-1-ol and it is member of the alcohol family. The chemical formula for ethanol can be written as C2H5OH, or as the alterâ¦native notation, CH3-CH2-OH. The latter expression tells you it's a straight-chain molecule, and it is also an expression of its structural formula. It's possible to write C2H6O, but that's an empirical formula.