Cu + S (t)= CuS
CuS + 2AgNO3 = Cu(NO3)2 + Ag2S
Cu(NO3)2 + Na2CO3 = CuCO3 + 2NaNO3
CuCO3 (t)= CuO + CO2
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Cu + S (t)= CuS
CuS + 2AgNO3 = Cu(NO3)2 + Ag2S
Cu(NO3)2 + Na2CO3 = CuCO3 + 2NaNO3
CuCO3 (t)= CuO + CO2