The following data were obtained in the spectrophotometric determination of iron. (a) Determine the linear least squares line.

(b) Compute the concentration of iron in a solution if its absorbance is 0.450.

Fe (ppm)

Absorbance

1.0

0.240

2.0

0.460

3.0

0.662

4.0

0.876​

solute : a solute is a substance that is dissolved in another substance is known as a solvent. it is mixed with a special mixture know as homogeneous mixture.

solvent: a solvent is a substance that dissolved a solute, which results in a solution is known as solvent.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.