Question

where are the chemical reactions by carbon compounds exhibited?

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Answer 1

Step-by-step explanation:

Carbon occurs in the crust of Earth in the form of carbonates in such rocks as marble, limestone, and chalk and in hydrocarbons—the principal constituents of coal, petroleum, and natural gas. Carbonate minerals are important sources of various metals, such as sodium, magnesium, calcium, copper, and lead.

Answer 2

Step-by-step explanation:

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