Question: Which element is oxidized and which is reduced in the following reactions? (a) N2(g) + 3 H2(g) 2 NH3(g) (b) 3 Fe(NO3)2(aq) + 2

Which element is oxidized and which is reduced in the following reactions?
(a) N2(g) + 3 H2(g) → 2 NH3(g)
(b) 3 Fe(NO3)2(aq) + 2 Al(s) → 3 Fe(s) + 2 Al(NO3)3(aq)
(c) Cl2(aq) + 2 NaI(aq) → I2(aq) + 2 NaCl(aq)
(d) PbS(s) + 4 H2O2(aq) → PbSO4(s) + 4 H2O(l)

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