Iron(II) sulfide reacts with hydrochloric acid according to the reaction: A reaction mixture initially contains 0.223 mol

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Iron(II) sulfide reacts with hydrochloric acid according to the reaction:FeS(s) + 2 HCl(aq)  FeCl(s) + HS(g)

A reaction mixture initially contains 0.223 mol FeS and 0.652 mol HCl. Once the reaction has occurred as completely as possible, what amount (in moles) of the excess reactant remains?

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