When iron rusts in air iron3 oxide is produced. how many moles of oxygen react with 28.0 mol of iron in the rusting reaction 4fe(s) 3o2(g) 2fe2o3(s)

This the balanced equation based on the question .

We then proceed with the following calculations



The answer is  is produced.

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.