Question: I need help checking these please! Which elements are being oxidized and reduced in the reactions below: 8. K+O2K2O Oxidized K Reduced O 9. CuSO4+MgMgSO4+Cu

I need help checking these please!

Which elements are being oxidized and reduced in the reactions below: 8. K+O2K2O Oxidized K Reduced O 9. CuSO4+MgMgSO4+Cu Oxidized My Reduced 10. CO2+C2CO Oxidized Reduced C

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