State whether the underlined elements have been oxidized/reduced and also state the number of electrons lost/gained. [10] a. Fe2O3 + 3 CO 2Fe + 3CO2 b. Cu2S + 2 Cu2O 6Cu + SO2 c. H2S + H2SO4 S + SO2 + 2 H2O d. 3 Zn + 8 HNO3 3 Zn(NO3)2 + 2 NO + 4H2O
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the underlined word are oxidized okay
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