Question

Iron(III) oxide is formed when iron combines with oxygen in the air. How many grams of Fe2O3 are formed when 25.9 g of Fe reacts completely with oxygen? 4Fe(s) + 3O2(g) ---> 2Fe2O3(s)

A.12.0g B. 25.0g C. 37.0g D. 49.0g

Answer 1

Answer: The correct answer is actually B. 23.9

Step-by-step explanation:

Answer 2

The balanced chemical reaction would be

4Fe(s) + 3O2(g) ---> 2Fe2O3(s)

We are given the amount of Fe to be used in the reaction. We use this as the starting point for the calculations. We do as follows:

25.9 g Fe (1 mol / 55.85 g) ( 2 mol Fe2O3 / 1 mol Fe ) (159.69 g / mol ) = 262.48 g Fe2O3 produced