Spinach is also a good source of magnesium because the chlorophyll molecule contains one magnesium/molecule. (molecular formula = CssHızMgN_Os; molecular weight = 893.49g/mol) A 2.500-g sample of spinach was extracted with an appropriate solvent and the solution diluted to the mark in a 100-mL volumetric flask (solution 1). A 5.00-ml aliquot of solution 1 was then diluted to the mark in another 100-mL volumetric flask to give solution 2. This dilution was repeated (5.00 mL diluted to the mark in a 100-mL volumetric flask) to give solution 3. The absorbance at 430 nm due to the chlorophyll in solution 3 was determined to be 0.138. (a) If the molar absorption coefficient of chlorophyll is 83,500 cm 'M", calculate the molarity of the chlorophyll in solution 3? Assume the culture tube was 1.00 cm. (b) Determine the percentage of magnesium in the spinach sample? The atomic weight of magnesium is 24.07 g. (c) The FDA minimum daily requirement (MDR) for magnesium is 350 mg. What percentage of the MDR is obtained in a 180.0-g (1 cup) serving of spinach? (Note: If you do not have an answer for part (b), assume the percentage of magnesium in the sample is 1%.)