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the separation of a dye into the different colours that make up that dye, as a result of the...
reversible reactions reach equilibrium, provided they occur in a closed container (closed system...
coal that is heated in the absence of air to about 1 000 °C to remove volatile substances.
the theory whereby molecules undergo effective collisions to form new molecules.
any process in which a substance reacts with oxygen to produce a significant rise in temperature...
a reaction in which all substances in a compound are combined with oxygen. Depending on what the...
adding aqueous HCl to a saturated solution of sodium ions and chloride ions to cause the...
Complementary colours are two colours that can added together to produce white. For example,...