GOLX 20 BL 98 STOICHIOMETRY PRACTICE: SHOW ALL WORK!!!!! 1. Iron reacts with oxygen to form solid iron(III) oxide. a) Write a balanced chemical equation for the reaction. Name b) If 4.0g iron completely reacted, how many grams of iron(III) oxide would form? Work Check c) If 3.0g oxygen completely reacted, how many grams of iron(III) oxide would form? d) If 4.0g iron reacted with 3.0g oxygen, which one would be the limiting reagent? e) How much iron(III) oxide would theoretically form? f) A student mixed 3.0g O2 and 4.0g Fe and obtained 4.8g Fe2O3. What was the percent yield? 9-5 Work Check