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When FeCI is ignited in an atmosphere of...

When FeCI is ignited in an atmosphere of pure oxygen, this reaction takes place:
`4FeCl_(2)(s)+3O_(2)(g)to 2Fe_(2)O_(3)(s)+6Cl_(2)(g)`
If 3 moles of are ignited in the presence of 2 moles of `O_(2)` gas, how much of which reagent is present in excess and therefore, remains unreacted?

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OP TANDON-STOICHIOMETRY (CHEMICAL FORMULAE AND EQUATIONS )-OBJECTIVE B
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