Question

1. what are the oxidation numbers in the compound fe₂o₃? options: fe=-3, o=+2; fe=-2, o=+3; fe=+3, o=-2; fe=+2, o=-3

Explanation:

Step1: Set known oxidation number

Oxygen has oxidation number $-2$.

Step2: Assign variable to unknown

Let oxidation number of Fe be $x$.

Step3: Use neutral compound rule

Sum of oxidation numbers in neutral compound is 0:
$$2x + 3(-2) = 0$$

Step4: Solve for x

$$2x - 6 = 0$$
$$2x = 6$$
$$x = 3$$

Answer:

B. Fe = +3, O = -2