400. mg of an unknown protein are dissolved in enough solvent to make 5.00 ml of solution. the osmotic pressure of this solution is measured to be 0.0861 atm at 25.0 °c. calculate the molar mass of the protein. round your answer to 3 significant digits. mol x 6 ?

The molecular weight of protein is

Explanation:

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

or,

where,

= Osmotic pressure of the solution = 0.0861 atm

i = Van't hoff factor = 1 (for non-electrolytes)

= mass of protein = 400 mg = 0.4 g   (Conversion factor:  1 g = 1000 mg)

= molar mass of protein = ?

= Volume of solution = 5.00 mL

R = Gas constant =

T = temperature of the solution =

Putting values in above equation, we get:

Hence, the molecular weight of protein is

personal, she chose to do it.