What is the equation to find the number of grams required to produce 100 grams of Iron oxide?

Answer 1

That depends on which molecule you are referring to when you say "iron oxide". All of the following are correctly referred to as "iron oxide" - either as iron (II) oxide or iron (III) oxide

FeO

Fe3O4

Fe4O5

Fe5O6

Fe5O7

Fe25O32

Fe13O19

Fe2O3

Assuming you are looking to find the number of grams of oxygen and iron respectively required to produce 100 grams of "iron oxide" you would have to refer to the atomic weights of iron (55.845) and oxygen (~ 15.999 or 16) and then use them to find the molecular weight of the chosen form of iron oxide. From that you would calculate the number of grams required from the formula:

For FemOn

g oxygen =

100 g x 1 mole FemOn/([55.845 x m] + [15.999 x n])g FemOn x n moles O/mole FemOn x 15.999 g O/mole O.

g iron =

100 g x 1 mole FemOn/([55.845 x m] + [15.999 x n])g FemOn x m moles Fe/mole FemOn x 55.845 g Fe/mole Fe.