In the chemical reaction shown below, which element was oxidized? 4fe + 3o2 yields 2fe2o3

Iron (Fe) is oxidised because:
a. It combines with oxygen
b. It's oxidation number is increased from 0 to +3

A3.5 gap gps and your masters degree

I’d have to say no because without oxygen in the water the fish would all be dead. so if you want to fish for dead fish, pick the ponds with the lowest oxygen concentrations.