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Ethanol Essay Preview: Ethanol Report this essay CHEMISTRY USES Oxygen (O2) Ali Mousavi Properties and bonding in oxygen Oxygen In normal conditions is a colourless, odourless and insipid gas, oxygen is as light blue liquid when it condensates. 1 Atomic number Atomic mass Electro negativity Density Melting point Boiling point Isotopes it exists in 15.999.