Which half-reaction would likely occur at the anode of a fuel cell that uses hydrogen as a fuel?
hydrogen atoms becoming hydrogen ions
hydrogen ions joining with oxygen to form water
hydrogen ions becoming hydrogen atoms
hydrogen atoms joining with oxygen to form water

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.