A student combines methane gas and oxygen gas in a reaction vessel, but does not measure the amounts of the gases. The two gases react according to the equation shown below. After the reaction is completed, how can the student determine the limiting reagent?

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.