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MrRa [10]
3 years ago
9

pyrite known as fools gold has the chemical formula FeS2. What is the weight fraction of iron Fe in pyrite

Geography
1 answer:
GREYUIT [131]3 years ago
4 0

\frac{55.845}{119.975} or 46.55%

Explanation:

 Formula of pyrite = FeS₂

 Problem:

Weight fraction of Fe in FeS₂

Solution

  Atomic mass of Fe = 55.845g/mol

  Atomic mass of S = 32.065g/mol

     To find the weight fraction of Fe in FeS₂:

     Weight fraction = \frac{atomic mass of Fe}{molar  mass of [tex]FeS_{2}}[/tex]

   molar mass of FeS₂ = [55.845 + 2(32.065)] = 119.975g/mol

Weight fraction of Fe = \frac{55.845}{119.975}

    As a percentage, weight fraction of Fe = 46.55%

#learnwithBrainly

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