How many moles of o2 react with 5.75 moles of fe?

4.3125 moles

The equation for the reaction between Fe and O₂ is given by;

4Fe + 3O₂ → 2Fe₂O₃

Therefore, 4 moles of Fe reacts with three moles of oxygen gas to form 2 moles of Fe₂O₃.

Therefore;

                                           = 4.3125 moles

Therefore, moles of oxygen gas that will react will 5.75 moles of Fe will be 4.3125 moles

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them