Exercises 3ESO stoichiometry

1. To obtain Alluminum, we ge reduce Alluminium  (III) oxide with graphite(C) to give Alluminium and Carbon dioxide. Write the chemical equation and tell how much Alluminium (in mass) we will get from a Kg of Alluminium  (III) oxide and how much CO2 will be produced.
   
2. The engine of a car burns 1kg fuel to run 20km. The formula of fuel is C8H16. If it reacts with oxigen to yield CO2 and water. Write the chemical equation of the proccess. Work out the mass of CO2 and water which is produced and the volume of O2 which is burnt.