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percent of Carbon is present in the earth's crust? Notes: Carbon is the 15th most abundant element in the earth's crust with a percentage of 0.18%. Oxygen is the most abundant element at 46%, followed by silicon at 27% and aluminum at 8.1.
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1) The total carbon in the crust of the earth is approximately 9 X lO^^ g, about three fourths of which is in the form of carbonate or COj. Over half of the total carbon is in the form of sedimentary carbonates, essentially all of which are biologic in origin.
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