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how much of rust will be formed when 100gms of iron is completely rusted away?

how much of rust will be formed when 100gms of iron is completely rusted away?
 

Grade:12th pass

1 Answers

Arun
25750 Points
5 years ago
the molar mass of Iron is 56g/mol. That means 100gm iron has 1.785714 moles of iron. The formula of rust is Fe2O3, so 4Fe+3O2=2Fe2O3. 4 moles of Fe gives 2 moles of rust, so 1.785714 moles of Fe gives 0.892857 moles of rust. The molar mass of rust is 56+56+16+16+16=160. 892.857*160=142.857g or 142.86g.

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