copper + nitric acid --> copper ____ + hydrogen copper + hydrochloric acid --> copper ____ + hydrogen copper + sulphuric acid --> copper ____ + hydrogen zinc + nitric acid --> zinc ____ + water zinc + sulphuric acid --> zinc ____ + hydrogen zinc + hydrochloric acid --> zinc ____ + hydrogen Iron oxide + hydrochloric acid --> Iron chloride + ____ Silver + hydrochloric acid --> silver ____ + hydrogen

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