The equilibrium constant for the reaction N2(g)+3H2(g)??2NH3(g)N2(g)+3H2(g)??2NH3(g) is Kp=4.34×10?3Kp=4.34×10?3 at 300 ?C?C. Pure NH3NH3 is placed in a 1.00-LL flask and allowed to reach equilibrium at this temperature. There are 1.07 gg NH3NH3 in the equilibrium mixture. What was the initial mass of ammonia placed in the vessel?