Beer Lambert's Law in Spectroscopy Quiz

What would be the absorbance reading at 20 % T?

• 0.2

• 0.5

• 0.7

• 0.9

What would be the absorbance reading at 80 %T?

• 0.01

• 0.02

• 0.1

• 0.2

What would be the transmittance reading at 0.25 absorbance?

• 0.46

• 0.56

• 0.66

• 0.76

What would be the transmittance reading at 1.00 absorbance?

• 0.1

• 0.2

• 0.3

• 0.01

A 20ppm of aspirin solution was found to give an absorbance of 0.80 in a 2 cm cell. Calculate it's molar absorptivity at the wavelength.

• 10 L/g cm

• 20 L/g cm

• 20 L/mol cm

• 20mL/g cm

A compound with a formula weight 280 absorbed 65 % of the radiation in a 2 cm cell at a concentration of 15.0 ug/mL. Calculate it's molar absorptivity.

• 425 mol/L

• 467 g/L

• 4256 mol/L

• 609 mol/L

A compound of formula weight 180 has an absorptivity of 286 L/(g cm). What is its molar absorptivity?

• 8954 mL/cm mol

• 51480 mL/cm mol

• 8954 L/cm mol

• 51480 L/cm mol