If the concentration of a protein is 600 micromole per liter, and its molecular mass is 68,500 g/mol, what is the concentration of this protein in units of milligrams per cubic centimeters.

Answer 1

1 mg = 1x10^-3 g

1 cubic centimeter = 1 ml = 1x10^-3 L

1 micromole (umol) = 1x10^-6 mole

Use dimensional analysis to solve this problem:

600 umol / L x 1x10^-6 mol / umol x 68,500 g / mol x 1x10³ mg / g x 1 L / 1x10^-3 ml = 41.1 mg / ml

Answer not corrected for sig.figs.