Question

How many grams of iron (Fe) will be produced if you start with 3.65 liters of carbon monoxide gas (CO) at STP?

Fe2O3 + 3 CO --> 2 Fe + 3 CO2

if you could explain how you got the answer, that would be great!

Answer 1

the balanced equation for the above reaction is as follows;
Fe₂O₃ + 3 CO --> 2 Fe + 3 CO₂
stoichiometry of CO to Fe is 3:2
molar volume states that 1 mol of any gas occupies a volume of 22.4 L
If 22.4 L contains 1 mol of CO
Then 3.65 L contains - 1/22.4 x 3.65 = 0.16 mol
3 mol of CO forms 2 mol of Fe
Then 0.16 mol of CO forms - 2/3 x 0.16 = 0.1067 mol of Fe
Therefore mass of Fe produced - 0.1067 mol x 55.8 g/mol = 5.95 g