Question

7. The units of molar absorptivity or molar absorption coefficient are :
(a) ma mol-1
(b) m mol-1
(c) mºmol
(d) m2 mol.
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Answer 1

Answer:

Units for molar absorptivity

In uv spectroscopy, the concentration of the sample solution is measured in mol L-1 and the length of the light path in cm. Thus, given that absorbance is unitless, the units of molar absorptivity are L mol-1 cm-1.

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