how are the structural formulas of water,, acetone,ethanol and methylated spirit written?

Answer 1

water H₂O
acetone CH₃-C(O)-CH₃
ethanol CH₃-CH₂-OH or C₂H₅OH
methylated spirit CH₃ OH

http://en.wikipedia.org/wiki/Water
http://en.wikipedia.org/wiki/Acetone
http://en.wikipedia.org/wiki/Ethanol
http://en.wikipedia.org/wiki/Methanol