Which of the Following Is True Concerning the Chemical Properties

Multiple Choice

Which of the following is true concerning the chemical properties of gypsum materials?

A) Chemically,the mineral gypsum is a hemihydrate of calcium carbonate.
B) To form the raw material into a powder,the manufacturer heats it and adds water.
C) When the dihydrate is again mixed with water,a product with a viscosity capable of flowing is produced.
D) The amount of water required to mix the calcium sulfate hemihydrate is greater than the amount required for the chemical reaction.