For 2SO2 (g) + O2 (g) ⇌ 2SO3 (g), Kp = 3.0 x 10 4 at 700 K. In a 2.00-L vessel the equilibrium mixture contains 1.18 g of SO3 and 0.107 g of O2.
How many grams of SO2 are in the vessel?
Express your answer using two significant figures.
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