attached

Solution:
1. b. [adenosine] = 0.004 g/L x (Absorbance of 3ul 0.4%Adenosine diluted in 3ml)/(Absorbance of unknown removed from plate)
2. f. [unknown adenosine] = [adenosine recovered from plate] x (100/%recovered)
Reference:
Dean, J.A., Ed. 1992. Lange’s Handbook of chemistry, 14 th Edition,...