Fe2+(s) + Cr6+(aq) → Fe3+(aq) + Cr3+(aq) Which element is being reduced?
Which element is being oxidized?
Which reactant is the reducing agent?
Which reactant is the oxidizing agent?

1) Cr is being reduced.

2) Fe is being oxidized.

3) Fe is the reducing agent.

4) Cr is the oxidizing agent.

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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