Stoichimetry

Question

iron, water and oxygen reacts to make iron lll hydroxide

 

a) how many  iron atoms reacted

b) how much iron lll hydroxide could be formed (grams)

Answer 1

Through a series of reactions, solid iron (Fe) will react with oxygen (O₂) and water (H₂O) to form iron hydroxide, Fe(OH)₃

 

These reactions can be summarized as 

4Fe(s) + 3O₂(g) + 6H₂O(l) ==> 4 Fe(OH)₃(s)

 

To answer your question, one needs to have more information.  In (a), the number of atoms of Fe reacting will depend on the mass of Fe and in (b) the mass of iron(III) hydroxide formed will also depend on the mass of Fe present.