D) Its position changes because the unbalanced forces move the object.
I believe the correct answer is the second option. There will be two cobalt atoms in one formula unit of cobalt (III) oxide. It has a chemical formula of Co2O3. This compound is does not naturally occur so it is being synthesized. It is mostly used as bleaching agent.
You’ll need to be sure to count all the atoms in each side of the chemical equation.
