I dont understand the working out. Why is the answer B? Thanks
in advance
Ammonium iodide...
Ammonium iodide dissociates reversibly to produce ammonia gas and hydrogen iodide gas: NH_4l(s) rlhar NH_3(g) + Hl(g) Calculate the partial pressure of NH_3 in a flask at 400 degree C after ammonium iodide has been heated and an equilibrium has been established K_P = 0215. 2.2 times 10^4 Pa 4.6 times 10^4 Pa 1.1 times 10^4 Pa 9.0 times 10^4 Pa 0.46 Pa