Acertai n compound containing only carbon and hydrogen was found to have a vapor density of 2.550 gl and 760 mm hg. if the empirical formula of this compound is ch, what is the molecular for mula of the compound?

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.