In what ways is the compound formed of iron and oxyge. different from a mixture of iron and oxygen

This can be explained by determining the difference between a compound and a mixture. In a compound, the elements are chemically combined meaning that they are sharing chemical bonds and therefore can only be chemically separated through a reaction. The elements in the mixture are only physically mixed and do not share chemical bonds. The elements can, therefore, be physically separated without a  reaction.  

a

explanation:

the correct answer is option d

explanation:

i was wrong its d because they dont use cm when calculating square roots