by 
Funnyroro
ANSWERS: 4
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I think it's carbon, but if Glenn Blaylock comes on and says it's something different listen to him.
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"The classification of coal is generally based on the content of volatiles. However, the exact classification varies between countries. According to the German classification, coal is classified as follows: Name Volatiles % C Carbon % H Hydrogen % O Oxygen % S Sulfur % Heat content kJ/kg Braunkohle (Lignite) 45-65 60-75 6.0-5.8 34-17 0.5-3 <28470 Flammkohle (Flame coal) 40-45 75-82 6.0-5.8 >9.8 ~1 <32870 Gasflammkohle (Gas flame coal) 35-40 82-85 5.8-5.6 9.8-7.3 ~1 <33910 Gaskohle (Gas coal) 28-35 85-87.5 5.6-5.0 7.3-4.5 ~1 <34960 Fettkohle (Fat coal) 19-28 87.5-89.5 5.0-4.5 4.5-3.2 ~1 <35380 Esskohle (Forge coal) 14-19 89.5-90.5 4.5-4.0 3.2-2.8 ~1 35380 Magerkohle (Non baking coal) 10-14 90.5-91.5 4.0-3.75 2.8-3.5 ~1 <35380 Anthrazit (Anthracite) 7-12 >91.5 <3.75 <2.5 ~1 <35300 The middle six grades in the table represent a progressive transition from the English-language sub-bituminous to bituminous coal, while the last class is an approximate equivalent to anthracite, but more inclusive (the U.S. anthracite has < 8% volatiles)." Source and further information: http://en.wikipedia.org/wiki/Coal#Types_of_coal
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Coal is a mixture of things. It forms for an accumulation of organic matter call peat. Just what the coal contains depends on what the peat from which it formed contained. Coal is mostly carbon (at least 50%), but it also contain a certain of sulfur and mineral matter. The mineral matter comes from sediment that is deposited with the peat.
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Dead things.
iwnit 
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