Fe(CN)63- + Re → Fe(CN)64- + ReO4--. What is reduced?
A. Fe
B. Re

Mn2+ + Co3+ → MnO2 + Co2+. What is oxidized?
A. Mn
B. Co

CrO42- + N2O → Cr3+ + NO. What is oxidized?
A. Cr
B. N

Help plss