(A) A 5.00 L evacuated flask is filled with 1.86 mol NOBr. At equilibrium at 25 °C, there is 0.082 mol of Br₂ present. Determine K_c and K_p for the reaction 2 NOBr(g) ⇌ 2 NO(g) + Br₂(g).

(B) 0.100 mol SO₂ and 0.100 mol O₂ are introduced into an evacuated 1.52 L flask at 900 K. When equilibrium is reached, the amount of SO₃ found is 0.0916 mol. Use these data to determine K_p for the reaction 2 SO₃(g) ⇌ 2 SO₂(g) + O₂(g).