SECTION II: FREE RESPONSE Calculator Permitted CLEARLY SHOW THE METHODS USED AND STEPS INVOLVED IN YOUR ANSWERS. It is to your advantage to do this, because you may earn partial credit if you do and little or no credit if you do not. Attention should be paid to significant figures. 2 Fe(s) + O2(g) Fe2O3(s) = kJ∙mol–1 ∆Hf˚ –824 1. Iron reacts with oxygen to produce iron(III) oxide as represented above. A 75.0 g sample of Fe(s) is mixed with 11.5 L of O2(g) at 2.66 atm and 298 K. (a) Calculate the number of moles of each of the following before the reaction occurs. (i) Fe(s) (ii) O2(g) the limiting reactant when the mixture is heated to produce Fe2O3. Support your answer with calculations. (c) Calculate the number of moles of Fe2O3 produced when the reaction proceeds to completion. 2. Answer the following questions that relate to the analysis of chemical compounds.
SECTION II: FREE RESPONSE Calculator Permitted CLEARLY SHOW THE METHODS USED AND STEPS INVOLVED IN YOUR ANSWERS. It is to your advantage to do this, because you may earn partial credit if you do and little or no credit if you do not. Attention should be paid to significant figures. 2 Fe(s) + O2(g) Fe2O3(s) ∆Hf˚ = –824 kJ∙mol–1 1. Iron reacts with oxygen to produce iron(III) oxide as represented above. A 75.0 g sample of Fe(s) is mixed with 11.5 L of O2(g) at 2.66 atm and 298 K. (a) Calculate the number of moles of each of the following before the reaction occurs. (i) Fe(s) (ii) O2(g) the limiting reactant when the mixture is heated to produce Fe2O3. Support your answer with calculations. (c) Calculate the number of moles of Fe2O3 produced when the reaction proceeds to completion. 2. Answer the following questions that relate to the analysis of chemical compounds.
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