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    4. whats coal made of@@@
    whats coal made of@@@

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    0  Views: 540 Answers: 1 Posted: 12 years ago
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      Same as @@ you CARBON  @@

      12 years ago. Rating: 4
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        ROMOS

        Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.
        commented 12 years ago


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