A 6.2\times 10-2 mg sample of a protein is dissolved in water to make 0.25 mL of solution. The osmotic pressure of the solution is 0.56 torr at 25 deg C. What is the molar mass of the protein? Show work

It has been observed experimentally that the AHpolution for methanol as solvent and dimethylsulfoxide (DMSO) as solute is negative. The structures of these compounds are given below. H. H A H3C "CH3 DMSO (dimethylsulfoxide) Methanol Please answer these questions in order to explain this fact: What IMFS are there between methanol molecules and other methanol molecules? Draw a diagram. What IMFS are there between DMSO molecules and other DMSO molecules? What IMFS are there between methanol molecules and DMSO molecules? Draw a diagram. If AHsolution for dissolving DMSO in methanol is negative, what does this say about the energy released in mixing methanol and DMSO molecules (AHmixing) as compared to the energy required in separating solute molecules from each other (AHsolute) and separating solvent molecules from each other (AHsolvent)? 26

3. The following data were obtained for the osmotic pressures of the nitrocellulose in acetone at 20 °C. (1 cmH2O = 9.62x10 atm) w (g/L) I1 (emH2O) | Il/w (cmH;O-L/g) 3.66 8.38 2.56 8.00 0.56 1.16 0.28 0.62 0.50 0.53 0.70 0.95 Calculate the limiting value II/w and hence the best estimate of the molecular wright. 4. A dilute aqueous sugar solution of total weight 1000 g contained 0.5 g of sugar(I) (M: 500 g/mol) and 0.3 g of sugar (II) (unknown M). The osmotic pressure of this solution was found to be 49.6 mmHg (across a suitable membrane separating it from pure water) at 25 °C. Calculate the molecular weight M of sugar (II) and give its molecular formula.

13 HW i Saved Sec. Ex. 8B - Osmotic pressure Be sure to answer all parts. Determine the concentration of an aqueous solution that has an osmotic pressure of 4.1 atm at 37°C if the solute is glucose. ok t M V nces Determine the concentration of an aqueous solution that has an osmotic pressure of 4.1 atm at 37°C if the solute is sodium chloride. Assume no ion pairing. st M ar as qu

β‑Galactosidase (β‑gal) is a hydrolase enzyme that catalyzes the hydrolysis of β‑galactosides into monosaccharides. A 0.395 gsample of β‑galactosidase is dissolved in water to make 0.138 L of solution, and the osmotic pressure of the solution at 25 ∘Cis found to be 0.609 mbar. Calculate the molecular mass of β‑galactosidase.

(Q 15 Q15) When a person is given intravenous fluids, the concentration of the dissolved substance in the fluid must match the concentration of the solute in the blood to avoid problems resulting from the change in osmotic pressure in the blood. One such liquid, called "isotonic saline", can be prepared by adding sodium chloride (NaCl) to distilled water. If the osmolality of the blood is about (Os 0.3), how many grams of dextrose (dextrose C6H1206), which does not dissociate, should be added to (L 1) of water to prepare an isotonic solution? Note that the molecular weight is 180. g/mole 54 g O O O 5.4 g 0.54 g 54 mg 5.4 mg 0.54 mg

In a laboratory experiment, students synthesized a new compound and found that when 14.95 grams of the compound were dissolved to make 290.0 mL of a ethanol solution, the osmotic pressure generated was 1.41 atm at 298 K. The compound was also found to be nonvolatile and a non-electrolyte. What is the molar mass they determined for this compound? g/mol Submit Answer Retry Entire Group 9 more group attempts remaining Cengage Learning Cengage Technical Support que MacBook Air Previous Next Save and Exit

What is the osmotic pressure of a solution prepared by adding 13.65 g of sucrose (C₁₂H₂O₁) 12 22 11 (m.w. 342) to enough water to make 250 mL of solution at 25 °C?

1-If 5.06 g of KNO3 is dissolved in 10.00 g water at 31 C°, then the solubility of KNO3in water is (а) 50.6 mlb) 0.506 (c) 197.62 (d) 1.98

The molar mass of an enzyme was determined by dissolving it in water, and measuring the height, h, of the resulting solution drawn up a capillary tube at 20 °C. The following data were obtained.C/(mg cm-3)         3.221       4.618      5.112       6.722h/cm                    5.746        8.238      9.119      11.990The osmotic pressure may be calculated from the height of the column, ∏= hpg, taking the mass density of the solution as p = 1.000 g cm-3 and the acceleration of free fall as g = 9.81 m s-2. Determine the molar mass of the enzyme.