Description : http://de.wikipedia.org/wiki/Milchs%C3%A4ure For what please, those dashes in hydrohypropanoic acid leading from hydrogen mean see the link. Thank you.
Last Answer : if you mean the bond at the hydroxyl, that's Natt's projection after all: the spatial representation, it works as a perspective - the wedge is out of the paper, the hatched wedge inside the paper in German Keilstrichformel --- note: sorry, but your parents gave you chemistry as a punishment?