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Two Fe standards were prepared from a 100ppm stock Fe solution for a UV-Vis experiment by pipetting 2mL and 5mL of the stock solution into

Two Fe standards were prepared from a 100ppm stock Fe solution for a UV-Vis experiment by pipetting 2mL and 5mL of the stock solution into separate 50mL volumetric flasks. Calculate the concentration of Fe in these standards?

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