One method for preparing pure iron from Fe2O3 is by reaction with carbon monoxide. Fe2O3 (s) + CO (g) →Fe (s) + CO2 (g) How many moles of carbon monoxide are needed to react completely with 122 kg of Fe2O3.

The 2292 moles of CO are needed to react completely with 122 Kg of Fe₂O₃.

Explanation:

Given dа ta:

Mass of Fe₂O₃ = 122 Kg (122*1000 = 122000 g)

Moles of CO = ?

Solution:

Chemical equation:

Fe₂O₃ + 3CO → 2Fe + 3CO₂

Number of moles of Fe₂O₃:

Number of moles = mass / molar mass

Number of moles = 122000 g / 159.69 g/mol

Number of moles = 764 mol

Now we will compare the moles of Fe₂O₃ with CO.

Fe₂O₃ : CO

1 : 3

764 : 3*764 = 2292 mol

The 2292 moles of CO are needed to react completely with 122 Kg of Fe₂O₃.