Hydrates are compounds that incorporate water molecules into their fundamental solid structure. In a hydrate (which usually has a specific crystalline form), a defined number of water molecules are associated with each formula unit of the primary material. Gypsum is a hydrate with two water molecules present for every formula unit of CaSO4.
LOS ANGELES, California (CNN) -- After losing out five times, director Martin Scorsese was awarded his first Oscar on Sunday for his mob informer movie The Departed.. And moments after Scorsese walked offstage, clutching his Oscar, The Departed was named best picture.
Oscar nominations: Woody Allen and Martin Scorsese will compete for the best director Oscar at the 84th Academy Awards for their respective films Midnight in Paris and Hugo. Also nominated were Michel Hazanavicius for The Artist, Terrence Malick for The Tree of Life and  Alexander Payne for The Descendants.