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paragraph styles 3 a student uses a stoppered 250 ml volumetric flask to determine the density of a liquid the mass of the empty flask and stopper was 251841 g the mass of the stoppered hask 93117

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SOLVED: An absorbance calibration curve for Na was fitted to the equation A = 1.23[Na, ppm]. In the original solution, a 5.00 mL aliquot of an unknown Na solution was diluted to 50.0 mL in a volumetric flask; the absorbance from this sample was measured to be 0.193. To a second 50.0 mL volumetric flask, a 5.00 mL aliquot of the unknown Na sample and a 0.50 mL aliquot of 10.00 ppm Na solution were added and diluted to the mark; the absorbance from this sample was measured to be 0.280. Calculate t