Question

If 15.0 grams of Iron are produced, how many grams of iron(III) oxide reacted?

Answer 1

we know that Fe2o3 on decomposing gives 2 moles of fe and 3/2 moles of o2

let no.of moles of fe2o3 = x

x= 15/55.8×2

and also req wt. = x × m.w of fe2o3(159.6)

on calculating we get the req. weight as 21.45.