A student placed 12.5g of glucose (C6H12O6 ) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. inL mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 20.0 mL sample of this glucose solution was diluted to 0.500 L. How many grams of glucose are in 100. mL of the final solution? Express your answer to three significant figures and include the appropriate units. A scientist wants to make a solution of tribasic sodium phosphate. Na3P04, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 550mL of a solution that has a concentration of Na+ ions of0.500M? Express your answer to three significant figures and include the appropriate units.