In Part C of the experiment, you will need to prepare 60. mL of a solution that is 0.10 M in sodium hydrogen phosphate heptahydrate (Na2HPO4 · 7 H2O, MW = 268.1 g/mol) and 0.10 M in ascorbic acid (C6H8O6, MW = 176.1 g/mol). (a) How many grams of sodium hydrogen phosphate heptahydrate will you need? Report your answer to three significant figures. WebAssign will check your answer for the correct number of significant figures. g Na2HPO4 · 7 H2O