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1. If a car releases 3.2g of sulphur dioxide for every kilometre it travels, what is the mass and volume of SO2 released if the car has travelled 5 KM? [ M.V (room) = 24 dm^5 ]2. Calculate the maximum mass of iron that can be extracted when 20.0 kg of hematite , Fe2O3 is heated with 25 kg of coal ? [ Ar : C = 12 , O = 16 , Fe = 55.8 ]3. A 250 cm3 of gaseous mixture of ethane and ethene was reacted with bromine at. S.T.P . If 1.34g of bromine was used, determine the percentage of ethene in the mixture .  [ MV at S.T.P = 22.4 dm^3 ]