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Depending upon its composition, each type of coal burns differently. The "older" the coal, the harder the coal, and the greater percentage of _______ present. A) carbohydrates B) carbon C) oxygen D) water
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Depending upon its composition, each type of coal burns differently. The "older" the coal, the harder the coal, and the greater percentage of _______ present. A) carbohydrates B) carbon C) oxygen D) water

User Francesco Borzi
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It is Carbon. I had this on USAtest prep

User Hilnius
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The answer you are looking for is B) Carbon. Hope this helps.
User Kravisingh
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