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20) When solutions copper(II) sulti AC utions of sodium sulfide and copper(II) sulfate are mixed, a precipitate of of (11) su

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40 answer is E

40) The given reaction is Na S (aq)CuSO4 (aq)Na2SO4 (aq) CuS (s) This Balanced molecular equation Total ionic equation Write

41 answer is combustion B. in generally hydrocarbon is burned in the presence of oxygen and produced carbon dioxide and water. so this is combustion reaction.

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