Deck 14: Par 3

Question 1

​Nucleic acids absorb wavelengths between 250 and 300 nm,and hemoglobin absorbs wavelengths around 600 nm.This means that:

A)​nucleic acids cannot absorb longer wavelengths as they are smaller than hemoglobin molecules are.
B)​nucleic acids are more conjugated than hemoglobin is.
C)​hemoglobin is more conjugated than nucleic acids are.
D)​hemoglobin molecules can absorb higher wavelengths because they are bigger than nucleic acids are.

Answer 1

​hemoglobin is more conjugated than nucleic acids are.

Question 2

​If the molar absorptivity of phthalocyanine is 162,000 L/( mol · cm),calculate the concentration of the compound in a solution placed in a cell of length 1-cm length and with a UV absorbance of 0.89.

A)​4.49 x 10^-6 mol/L
B)​5.49 x 10^-6 mol/L
C)​6.49 x 10^-6 mol/L
D)​7.49 x 10^-6 mol/L

Answer 2

​5.49 x 10^-6 mol/L