Which element has the greatest average atomic mass

One of the reactions in a blast furnace used to reduce iron is shown above. how many grams of fe2o3 are required to produce 15.5 g of fe if the reaction occurs in the presence of excess co? a.11.1 g b.22.1 g c.30.0 g d.44.2 g

What is the percentage by mass of silicon (si) in iron aluminum silicate (fe3al2(sio4)3)?

What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?