1) The iron content in multivitamin tablets was determined using atomic absorption spectroscopy. The absorbances of four standards were measured. Three multivitamin tablets were selected. Each tablet was dissolved in 100.0 mL of water. The absorbance of each of the three solutions was then measured.
The following absorbances were obtained.

a) Use the grid below to construct a calibration graph of the absorbances of the standard solutions.

b) Determine the average iron content, in milligrams, of the multivitamin tablets.

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c) Spectroscopic techniques work on the principle that, under certain conditions, atoms, molecules or ions will interact with electromagnetic radiation. The type of interaction depends on the wavelength of the electromagnetic radiation.
Name one spectroscopic technique that you have studied this year.

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d)Which part of the electromagnetic spectrum does this technique use?

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e) How does this part of the electromagnetic spectrum interact with matter? What information does this spectroscopic technique provide?

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