Gce Model Questions Vol1 2020 Chemistry Question 34
Practice objective / multiple choice question 34 from the 2020 Gce Model Questions Vol1 Chemistry examination.
Thermite reaction: \(Fe_{2}O_{3} + 2Al \rightarrow 2Fe + Al_{2}O_{3}\). If 12.0 g of \(Fe_{2}O_{3}\) reacts with excess aluminium and 85 % of the iron produced is recovered, the recovered iron is then allowed to oxidise completely to \(Fe_{2}O_{3}\). Calculate the mass of \(Fe_{2}O_{3}\) formed in this second step. (Molar masses: \(Fe_{2}O_{3}=159.7\) g mol\(^{-1}\), \(Fe=55.85\) g mol\(^{-1}\)).
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This is Gce Model Questions Vol1 2020 Chemistry Question 34. It is one of the objective questions from the 2020 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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