a) Enter a balanced equation for the reaction between solid iron (III) oxide and carbon monoxide gas that produces solid iron and carbon dioxide gas. Express your answer as a chemical equation. Identify all of the phases in your answer. (Incorrect: Fe2O3+3CO--->2Fe+3CO2)

b) The combustion of gasoline produces carbon dioxide and water. Assume gasoline to be pure octane (C8H18)(C8H18) and calculate the mass (in kg) of carbon dioxide that is added to the atmosphere per 2.7 kg of octane burned. (Hint: Begin by writing a balanced equation for the combustion reaction.)

Express your answer in kilograms to two significant figures. (Incorrect: 7.7kg)

c) Urea (CH4N2O)(CH4N2O) is a common fertilizer that can be synthesized by the reaction of ammonia (NH3)(NH3) with carbon dioxide as follows:

2NH3(aq)+CO2(aq)CH4N2O(aq)+H2O(l)2NH3(aq)+CO2(aq)CH4N2O(aq)+H2O(l)

In an industrial synthesis of urea, a chemist combines 132.9 kg of ammonia with 211.4 kg of carbon dioxide and obtains 178.8 kg of urea.

(Incorrect: 2NH3+CO2CH4N2O+H2O)

d) Mining companies use this reaction to obtain iron from iron ore:

Fe2O3(s)+3CO(g) 2Fe(s)+3CO2(g)Fe2O3(s)+3CO(g) 2Fe(s)+3CO2(g)

The reaction of 187 gg of Fe2O3Fe2O3 with 83.4 gg of COCO produces 71.9 gg of FeFe.

Determine the percent yield of solid iron.

Express your answer to three significant digits.