Having 2SO3(g) > 2SO2(g) + O2(g) the Kc = 3.57 x 10^-3 at 726.85 celcius degrees what is the equilibrium K for the following reaction at 726.85 celcius degrees and 0.25 mol SO3(g)> 0.25 mol SO2(g) + 0.125 mol )O2(g) answers 0.00357 2.64x10^-20 4.46 x10^-4 0.494 0.244

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.