Problem- What mass of riboflavin (in mg) must be dissolved in 0.02 M acetic acid solution (Solution #1, assume density is 1.0 g/mL) to create 500 mL of a 50.0 ppm standard solution of riboflavin (Solution #2)?
Determine the volume of Solution #2 that is needed to make 25.00 mL of 2ppm solution?
Calculate the percent riboflavin (to 3 significant figures) in a 50 mg multivitamin that was dissolved in 250 mL of 0.02 M acetic acid (assume density of acetic acid = 1 g/mL), given the fluorescence of the multivitamin is 0.142.
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