A polymer of large molar mass is dissolved in the organic solvent dimethylformamide (C3H7NO) at 25 °C, and the resulting solution rises to a final height of 10.8 cm above the level of the pure solvent, as solvent molecules pass through a semipermeable membrane into the solution. If the solution contains 3.80 g polymer per liter, calculate the molar mass of the polymer. Take the density of the solution to be 0.944 g cm-³. Molar mass polymer = g mol-1

A certain substance X has a normal freezing point of 4.7 °C and a molal freezing point depression constant K₁ = 3.86 °C · kg • mol by dissolving some urea ((NH,),CO) in 600. of X. This solution freezes at 1.3 °C. Calculate the mass of urea that was dissolved. Be sure your answer has the correct number of significant digits. g ☐ x10 X 1 . A solution is prepared 5

Match the term with the related statement, A mixture with particles that settle out if undisturbed. The visible erratic motion of colloid particles, under a microscope. A measure of how much solute is dissolved in a specific amount of solvent or solution. The overall energy change that occurs when a solution forms A heterogeneous mixture of intermediate size particles. The process of surrounding solute particles with solvent particles. A homogeneous mixture with particles less than 1 nm in diameter whose solute cannot be filtered out or settled out of solution. The scattering of light by dispersed colloid particles. : colloid : Tyndall effect : suspension : solvation : heat of solution : concentration : solution : Brownian motion Review DELL %24 4 7 * 00 口 #3

Bovine serum albumin (BSA) is a biochemically useful protein. A 0.303 g0.303 g sample of bovine serum albumin is dissolved in water to make 0.137 L0.137 L of solution, and the osmotic pressure of the solution at 25 ∘C25⁢ ∘C is found to be 0.826 mbar.0.826 mbar. Calculate the molecular mass of bovine serum albumin.