Full credit will not be given for only answers without work. Limiting reagent is not involved in working the problems. Part 3: Work the following conservation of mass problems. Remember to show your work. Using the balanced equation 4 Fe + 3 02 2 Fe203 a. If 55.8 grams of iron combines with 24 grams of oxygen, how many grams of iron (!!) oxide would be produced? b. If 74.4 grams of iron combines with oxygen and produces 106.4 grams of iron (II) oxide, how many grams of oxygen were used in the reaction? Using the balanced equation Pb + 12 - Pbl2 c. If 20.7 grams of lead combines with 25.4 grams of iodine, how many grams of lead (II) iodide would be produced