To calculate the osmolarity of a solution containing 10mM Albumin, we need to consider the number of particles contributed by Albumin in the solution. Albumin is a large protein molecule with a high molecular weight, and it does not dissociate into smaller particles in solution. Therefore, each Albumin molecule contributes one particle to the solution.

The formula to calculate osmolarity is:

Osmolarity = Total concentration of solute particles (in millimoles) / Volume of solution (in liters)

Given that the concentration of Albumin is 10mM and the volume of the solution is 1L, we can calculate the osmolarity as follows:

Osmolarity = 10 mM (since each Albumin molecule contributes one particle) / 1L

Osmolarity = 10 milliosmoles/L (mOsm/L)

Therefore, the osmolarity of the 1L solution containing 10mM Albumin is 10 milliosmoles per liter (mOsm/L).