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9 April, 09:09

Calculate the moles of oxygen gas which will react with 89.4 grams of iron.

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  1. 9 April, 10:57
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    No of moles of Fe = Mass / Relative molar mass of Fe. So no of moles = 89.4 / 55.845 = 1.60. The. Chemical reaction is represented as follows. 4 Fe + 3 O2 which gives 2Fe2 O3. This means that 4 atoms of Iron reacts with 3 atoms of Oxygen to produce Iron oxide. Hence 1.60*4 moles of Fe will need to react 1.6 * 3 moles of Oxygen to produce 2 moles of Iron oxide. Hence 4.8 moles of Oxygen will be required.
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