It is found that, when a dilute gas expands quasistatically from 0.80 to 3.0 L, it does 280 J of work. Assuming that the gas temperature remains constant at 300 K, how many moles of gas are present

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.