[tiny]

NH4CO2NH2 ...> (yields) 2NH3 + Co2 (g)

If at 40 degress C this decomposition reaction has a total pressure of .363 atm, what is Kp?

[DevaDevil]

total pressure = pressure of all reactants and products added together.
NH4CO2NH2 is a solid and the partial pressure of it is negligable
As you have the reaction equation you can calculate the fraction of CO₂ and NH₃ of the pressure (and thus calculate their partial pressures)

Kp for this reaction is the product of the partial pressures of the products

[tiny]

thank you soo much..you helped me alot..i got it now..thanks again..