Coal
Coal is one of the fossil fuels. General sense is a sedimentary rock that can be burned, formed from organic deposits, primarily remnants of plants and are formed through a process pembatubaraan. The main elements consist of carbon, hydrogen and oxygen.
Coal is also an organic rock that has physical properties and chemical complex which can be found in various forms.
Element analysis provides an empirical formula such as C137H97O9NS formula for bituminous and anthracite C240H90O4NS for.

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