Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite solid-fuel rocket motors. The reaction is given below. Fe2O3(s) + 2 Al(s) 2 Fe(l) + Al2O3(s) What masses of iron(III) oxide and aluminum must be used to produce 12.0 g iron? iron (III) oxide WebAssign will check your answer for the correct number of significant figures. 17.2 Correct: Your answer is correct. g aluminum WebAssign will check your answer for the correct number of significant figures. 2.98 Incorrect: Your answer is incorrect. g What is the maximum mass of aluminum oxide that could be produced?

1. Iron(III) oxide: 17.2 g2. Aluminum: 5.80 g3. Aluminum oxide: 11.0g

Explanation:

1. Chemical reaction (given)

   

2. Mole ratios

   

3. Convert 12.0g of iron to moles

atomic mass of Fe: 55.845g/molnumber of moles = mass in grams / atomic massnumber of moles = 12.0g / 55.845g/mol = 0.215mol

4. Iron(III) oxide

molar mass Fe₂O₃: 159.69 g/molmole ratio: 1 mol Fe₂O₃ : 2 mol Fe

       

5. Aluminum

atomic mass Al: 26.982g/molmole ratio: 2 mol Al : 2 mol Fe

       

6. Aluminum oxide

molar mass Al₂O₃: 101.96g/molmole ratio: 2mol Fe: 1 mol Al₂O₃

       

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