O Macmillan Learning A powder contains FeSO4 · 7 H₂O (molar mass = 278.01 g/mol), among other components. A 3.665 g sample of the powder was dissolved in HNO3 and heated to convert all iron to Fe³+. The addition of NH3 precipitated Fe₂O3 xH₂O, which was subsequently ignited to produce 0.342 g Fe₂O3. What was the mass of FeSO4.7H₂O in the 3.665 g sample? mass of FeSO4.7H₂O: 0.76 Incorrect g

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".