| 41. | The iron oxide cycle is a series of produce hydrogen.
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| 42. | One is when arsenate is reduced to arsenite which adsorbs to iron oxides less strongly.
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| 43. | -- Much of the moon rock contains oxygen, such as aluminum oxide and iron oxide.
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| 44. | Blood, say romantics, though iron oxide is more likely.
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| 45. | Iron oxides colour sand from yellows to rich browns.
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| 46. | Tin and iron oxides are often used to give the stone a highly reflective exterior.
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| 47. | The second method involves oxidizing the phosphorus during the fining process by adding iron oxide.
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| 48. | Lovley said Strain 121 uses iron oxide in the vent streams to metabolize organic molecules.
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| 49. | Iron oxide impurities are reduced and form iron phosphides.
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| 50. | Archaeologists found bits of clay, iron oxide and manganese that were excavated to make paint.
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