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a 40.0 gram sample of solid ammonium carbonate is placed in an evacuated 3.00L flask and heated to 400.0 C. it decomposes to produce water, ammonia, and carbon dioxide according to this equation: (NH4)2CO3 (s) double arrow H2O (g) 2NH3 (g) CO2 (g)
the equilibrium constant Kp= 0.295 atm4 at 400.0 C.

what is the minimum amount of ammonium carbonate that is necessary to be placed in the flask in order for the system to come to equilibrium? please show work.

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