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CBSE Class 11-science Answered

An iron ore sample is impure Fe2O3. When Fe2O3 is heated with an excess of carbon , iron metal is produced as per the following equation:

Fe2O3(s)+3C(s)→2Fe(s)+3CO(g)

From a sample of ore weighing 752 kg ,453 kg of pure iron was obtained.What is the % of Fe2O3 in the sample?

Asked by dineshchem108 | 15 Jul, 2018, 05:48: PM
Expert Answer

Given:

Weight of sample = 752 kg
 
Weight of Fe = 453 kg
 
Weight space of space Fe subscript 2 straight O subscript 3 equals space fraction numerator 453 cross times 159.69 over denominator 255.85 end fraction

space space space space space space space space space space space space space space space space space space space space space space space space space space equals 647.62

percent sign space of space space Fe subscript 2 straight O subscript 3 space equals fraction numerator 647.62 over denominator 752 end fraction cross times 100

space space space space space space space space space space space space space space space space space space space space space equals 86.11 percent sign
 
%Fe2O3  is 86.11%
Answered by Varsha | 15 Jul, 2018, 07:42: PM

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