heating metal in the presence of carbon.
the process whereby carbon is turned into carbohydrates in plants, and becomes available as an...
a base that ionises completely, e.g. NH3, NaOH.
a method used to refine petrol by breaking covalent bonds between carbon atoms using heat and a...
material left over after copper is removed.
the process during which nitrogen gas is converted into substances that can be used by plants,...