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the use of a catalyst to bring about the cracking of mineral oils that boil at high temperatures.
a molecule containing anything from thousands to hundreds of millions of atoms per molecule, a...
the sum of the number of protons and neutrons (the nucleons) in the nucleus of an atom. It...
dealing only with the nature, and not with the specific amounts of the substance under...
the use of an electric current to cause chemical change in a liquid.