Unanswered • 1 attempt left The absorbance of four Fe2+ solutions with a blank were measured to obtain a calibration curve that gave the following best fit line: Y = 0.3425x + 0.0975 (x is the conc of Fe 2+ in ug/ml) A vitamin tablet was dissolved in 500ml in a volumetric flask. The 10 ml of this solution was removed and diluted to 100ml in a volumetric flask. The absorbance of this solution was measured to be 0.450. Calculate the mg of Fe in the vitamin tablet. A 10.3 mg B 2.58 mg C 4.56 mg D 5.15 mg

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Basic Chemical Calculations (Process and Variables)

A basic chemical calculation involves the application of the law of chemical proportions to various reactions and material and energy balance calculations on various chemical processes. Basic chemical calculation helps students analyze various chemical processes and develop problem-solving skills. The chemical manufacturing processes are divided into unit operations involving physical changes of material and unit processes involving the chemical transformation of materials. For instance, fluid flow, heat transfer, and mass transfer are unit operations, and oxidation, reduction, and pyrolysis are unit processes.