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the temperature at which a substance changes phase from a solid to a liquid at a specific or fixed pressure.
a method of determining the concentration of an acid or base by neutralising it with a base or...
a method used to refine petrol by breaking covalent bonds between carbon atoms using heat and a...
a solid network of atoms making up a large crystal with covalent bonds between the atoms.
an increase in the amount of nutrients in the water, which causes algae to grow and decay...