During an investigation, a scientist heated 123.6 g of copper carbonate till it decomposed to form a black residue.

The missing component to the table to the right or indicated with orange letters complete the table by filling in the corresponding numbers or symbols

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Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world