Answer to Question #27232 in Inorganic Chemistry for sam

Question

how many grams of carbon are neede to completely react with 125 g of iron3 oxide?

Answer 1

The chemical equation for this reaction is

2Fe₂O₃ + 3C = 4Fe + 3CO₂

n(mol) = m(g) / M_W(g/mol)

n(Fe₂O₃) = 125 / (55.8 x 2 + 16 x 3) = 0.783 mol

According to the chemical equation n(C) = n(Fe₂O₃) : 2 x 3 = 0.783 : 2 x 3 =1.17 mol

m(C) = n x M_W = 1.17 x 12 = 14.04 g

Answer: m(C) = 14.04 g