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Question

Write the molecular formulae for the following compound-

Iron (III) sulfide


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Solution

Molecular formula

  • The number of atoms of each element in one molecule of a compound is expressed by the molecular formula.

Molecular formula for Iron (III) sulfide

  • Write the constituent elements and their valencies as shown below.
  • Then we must crossover the valencies of the combining atoms.

  • Hence, the molecular formula of Iron (III) sulfide is Fe2S3.

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