(a) Mineral 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed are naturally occuring rocks that provide the starting point for the 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed and manufacture of useful metals.

(b) Ores must contain enough metal to make it 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed to extract the metal.

(c) Unreactive metals such as 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed are found in the Earth as the free metal itself but most metals are found as 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed that require 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed to extract the metal.

(d) Metals that are less 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed than carbon can be extracted from their oxides by 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed with 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed, for example 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed is reduced in the 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed to
make iron.

(e)Balance the following equations showing several chemical reactions that can form iron.
Fe₂O₃ + 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressedCO ===> 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressedFe + 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressedCO₂
2Fe₂O₃ + 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressedC ===> 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressedFe + 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressedCO₂
Fe₃O₄ + 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressedCO ===> 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressedFe + 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressedCO₂
Fe₃O₄ + 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressedC ===> 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressedFe + 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressedCO₂

(f) Iron from the 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed contains about 96% iron and 4% carbon and other 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed which makes the iron 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed and limits its uses.

(g) Removing all of the impurities would produce 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed iron

(h) Pure iron has a regular 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed of 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed, with layers that can readily 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed over each other when 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed, and so is soft and easily 234arrangementatomsblastbrittlecarbonchemicalcompoundseconomicalextractionfurnacegoldimpuritiesironoresoxidepurereactionsreactivereductionshapedslidestressed, but too soft for many uses.