Answer to Question #172671 in General Chemistry for bruce mcfarland

Question

in the formula of iron(lll) oxide Fe2O3, what is the mole relationship between Fe and Fe2O3 ?

Answer 1

The molar mass of Fe is 55.845 grams

(1 mole Fe = 55.845 grams Fe).

The molar mass of O₂ is 2 x 16.00 or 32.00 grams (1 mole O₂ = 32.00 grams O₂).

The mass of a mole of Fe₂O₃ is

(2 x Fe) + (3 x Oxygen)

(2 x 55.845) + (3 x 16.00) = 159.69 grams (1 mole of Fe₂O₃ = 159.69 grams Fe₂O₃).