Amolecule is known to have a molar absorptivity of 18,650 at a certain wavelength. a spectrometer is tuned to this wavelength and used to measure the absorbance of a solution of this substance in a b = 1 cm cuvette. the indicated absorbance of the sample was 1.04. the tested solution used in the experiment was prepared by dissolving 100 mg of the substance into a 100 ml volumetric flask. what is the molecular weight of the substance / molecule tested?

17,932.69 g/mol is the molecular weight of the substance.

Explanation:

Using Beer-Lambert's law :

Formula used :

where,

A = absorbance of solution = 1.04

c = concentration of solution =?

l = length of the cell = 1 cm

= molar absorptivity of this solution = 18,650

Now put all the given values in the above formula, we get the molar absorptivity of this solution.

c =

V = Volume of the solution in L

Molecular weight of the substance = x

V = 100 mL = 0.1 L

Mass of the substance = 100 mg = 0.1 g

x = 17,932.69 g/mol

17,932.69 g/mol is the molecular weight of the substance.

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explanation:

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.