for the reaction: NH2COONH4 ---> 2NH3 + CO2/
the equilibrium constant  kp= 2.9*10^ -5 atm^3. the total pressure of gases at equilibrium when 1.0 mole of reactant was heated will be 

NH2COONH4 2NH3 + CO2AT equilibrium, partial pressure of CO2 = pNH3 = 2pKP = pNH32 × pCO2 = 2p2 × p = 4p34p3 = 2.9 × 10-5p = 1.9×10-2Total pressure = 2p +p = 3p     = 3 × 1.9 × 10-2    = 5.81 × 10-2   = 0.0581 atm

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