1.

What concentration of `CO_(2)` be in equilibrium with `0.025 M` CO at `120^(@)C` for the reaction `FeO(s)+CO(g) hArr Fe(s)+CO_(2)(g)` if the value of `K_(c)=5.0` ?A. `0.125 M`B. `0.0125 M`C. `1.25 M`D. `12.5 M`

Answer» Correct Answer - A
`{:(,FeO(s),+,CO(g),hArr,Fe(s),+,CO_(2)(g)),("At eq.",-,,0.025,,-,,x),(,"solid",,,,"solid",,):}`
`K_(c)=[(CO_(2)(g))/(CO(g))]=x/0.025=5.0` (Given)
`:. x=0.125 M`
`[CO_(2)]=0.125 M`


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