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2. Nitric acid - Wikipedia

   en.wikipedia.org/wiki/Nitric_acid

   White fuming nitric acid, pure nitric acid or WFNA, is very close to anhydrous nitric acid. It is available as 99.9% nitric acid by assay, or about 24 molar . One specification for white fuming nitric acid is that it has a maximum of 2% water and a maximum of 0.5% dissolved NO 2 .

3. Carbon nanotube - Wikipedia

   en.wikipedia.org/wiki/Carbon_nanotube

   Chemical routes such as covalent functionalization have been studied extensively, which involves the oxidation of CNTs via strong acids (e.g. sulfuric acid, nitric acid, or a mixture of both) in order to set the carboxylic groups onto the surface of the CNTs as the final product or for further modification by esterification or amination. Free ...

4. Alternative fuel - Wikipedia

   en.wikipedia.org/wiki/Alternative_fuel

   Off-peak wind power prices in high wind penetration areas of the U.S. averaged 1.64 cents per kilowatt-hour in 2009, but only 0.71 cents/kWh during the least expensive six hours of the day. [32] Typically, wholesale electricity costs 2 to 5 cents/kWh during the day. [ 46 ]