Skip to content
MathsGenie logo
Quick links
Open app

Course home

  1. IGCSE
  2. Chemistry Edexcel
  3. Question bank

Chemical formulae, equations and calculations

EasyMedium
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586
Question 35

Iron is extracted from its ore, hematite (Fe2O3\text{Fe}_2\text{O}_3Fe2​O3​), in a blast furnace. Carbon monoxide reduces the iron(III) oxide to molten iron according to the reaction:

Fe2O3(s)+3CO(g)→2Fe(l)+3CO2(g) \text{Fe}_2\text{O}_3(s) + 3\text{CO}(g) \rightarrow 2\text{Fe}(l) + 3\text{CO}_2(g) Fe2​O3​(s)+3CO(g)→2Fe(l)+3CO2​(g)
a.

Calculate the maximum amount, in moles, of iron (Fe\text{Fe}Fe) that could be formed from 240 kg240\text{ kg}240 kg of iron(III) oxide, assuming all of the iron(III) oxide is converted. (Take the relative atomic mass of Fe=56\text{Fe} = 56Fe=56 and O=16\text{O} = 16O=16.)

[4]
b.

In practice, under specific blast furnace operating conditions, only 85%85\%85% of the iron(III) oxide is converted into iron. Calculate the actual amount, in moles, of iron formed from this reactant mixture.

[2]

Chemical formulae, equations and calculations Questions

  1. IGCSE
  2. /Chemistry
  3. /Chemical formulae, equations and calculations