Compounds may be represented by chemical formulas. in the chemical formula for water which is h20, the 2 which represents the number of hydrogen atoms is a) the reactant. b) the subscript. c) the coefficient. d) the atom factor.

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.