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a reaction that takes place automatically by itself, without requiring extra stimulation.
a hydrocarbon with single bonds between carbon atoms and at least one hydrogen replaced by a...
coal that is heated in the absence of air to about 1 000 °C to remove volatile substances.
a method used to refine petrol by breaking covalent bonds between carbon atoms using heat and a...
useful summaries of information telling you which ionic compounds (or combinations of ions) are...
completes the circuit between the two half-cells in an electrochemical cell.