black product to the initial 5g placed in the flask, could the remaining black compound be the anhydrous copper carbonate hydroxide molecule CuCO(OH)?…

From the ratio of the mass of the black product to the initial 5g placed in the flask, could the remaining black compound be the anhydrous copper carbonate hydroxide molecule Cu₂CO₃(OH)₂? The molecular weight of Cu₂CO₃(OH)₂ is 221.116 g/mol, while that of water is 18.015 g/mol. Show your calculations.

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