1. Consider the following equilibrium: 2SO2 (g) + O₂ (g) = 2S03 (g) a. Write the equilibrium expression for the reaction. b. 0.600 moles of SO₂ and 0.600 moles of O₂ are present in a 4.00 L flask at equilibrium at 100°C. If K. = 680, calculate the SO3 concentration at 100°C.​