As shown in Table 15.2, the equilibrium constant for the reaction N2(𝑔) + 3 H₂(𝑔) ⇌ 2 NH₃(𝑔) is 𝐾_𝑝 = 4.34×10⁻³ at 300°C. Pure NH3 is placed in a 1.00-L flask and allowed to reach equilibrium at this temperature. There are 1.05 g NH₃ in the equilibrium mixture. (b) What was the initial mass of ammonia placed in the vessel?