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Some solid NH4HS is placed in a flask co...

Some solid `NH_4HS` is placed in a flask containing 0.5 atm `NH_3`. What is the equilibrium presence of `NH_3` if `K_p =0.11 atm^2` for the reaction `NH_4HS(s) leftrightarrow NH_3(s)+H_2S(g)`.

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0.665 atm
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