An aqueous solution of 0.0190g of a protein in 10.0 mL of water at 20.0 ̊C...

An aqueous solution of 0.0190g of a protein in 10.0 mL of water at 20.0 ̊C shows a 5.22 cm rise inthe apparatus shown in the figure. Assume the density of the solution

to be 0.998g/mL, andthe density of mercury to be 13.6 g/cm3. What is the molar mass of the protein?

Solutions

Expert Solution

pressure of system = 5.22 x 10/760 = 0.07 atm

So,

molarity of solution = p/iRT

= 0.07/1 x 0.08205 x (273 + 20)

= 0.003 M

molar mass of protein = 0.0190 g/0.003 M x 0.01 L

= 633.33 g/mol

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

10.0 g of a substance at 60.0°C is placed into 20.0 g water at 5.00°C. The...

10.0 g of a substance at 60.0°C is placed into 20.0 g water at 5.00°C. The final temperature of both materials is 12.0°C. What is the specific heat of the unknown material?

calculate the ph of a solution made by mixing 20.0 ml of 0.200 m h2so3, 10.0...

calculate the ph of a solution made by mixing 20.0 ml of 0.200 m h2so3, 10.0 ml of 0.120m naoh, 10.0ml of 0.150 m hcl, and 10.0ml of 0.200 m na2so3. (pka1: 1.857, pka2: 7.172 for h2so3)

A 0.380 m aqueous solution of NaCl is prepared at 20.0∘C. Assume that the density of...

A 0.380 m aqueous solution of NaCl is prepared at 20.0∘C. Assume that the density of the solution at 20.0∘C is 1.082 g/mL. Calculate the molarity of the salt solution.

250 mL of water at 20.0 ∘C is placed in the freezer compartment of a refrigerator...

250 mL of water at 20.0 ∘C is placed in the freezer compartment of a refrigerator with a coefficient of performance of 4.00. How much heat energy is exhausted into the room as the water is changed to ice at -5.00 ∘C?

1) Thirty grams of silicon at 80.0°C is added to 70.0 mL of water at 20.0°C....

1) Thirty grams of silicon at 80.0°C is added to 70.0 mL of water at 20.0°C. Calculate the final temperature after the two substances are mixed together. The specific heat of water is 4.184 J/g°C and the specific heat of silicon is 0.7121 J/g°C. 2) A cube of brass, 2 cm on a side, is heated until the temperature of the brass is 75oC. The cube is quickly added to 100 mL of water at 23oC. What is the final...

Calculate the pH when 20.0 mL of 0.200M ethylamine (C2H5NH2) are titrated with 10.0 mL of...

Calculate the pH when 20.0 mL of 0.200M ethylamine (C2H5NH2) are titrated with 10.0 mL of 0.300M nitric acid. Kb for ethylamine is 1.1×10-6.

Calculate the pH when 20.0 mL of 0.200M ethylamine (C2H5NH2) are titrated with 10.0 mL of...

Calculate the pH when 20.0 mL of 0.200M ethylamine (C2H5NH2) are titrated with 10.0 mL of 0.300M nitric acid. Kb for ethylamine is 1.1×10-6.

A solution of 2.0 g of (+)-glyceraldehyde, HOCH2￢CHOH￢CHO in 10.0 mL of water was placed in...

A solution of 2.0 g of (+)-glyceraldehyde, HOCH2￢CHOH￢CHO in 10.0 mL of water was placed in a 100-mm cell. Using the sodium D line, a rotation of+1.74° was found at 25 °C. Determine the specific rotation of 1+2-glyceraldehyde. Calculate the e.e. and the specific rotation of a mixture containing 6.0 g of (+)2-butan-2-ol and 4.0 g of (-)-butan-2-ol. (rotation of pure enantiomer= +13.5°)

A calorimeter contains 20.0 mL of water at 12.5 ∘C . When 1.40 g of X...

A calorimeter contains 20.0 mL of water at 12.5 ∘C . When 1.40 g of X (a substance with a molar mass of 64.0 g/mol ) is added, it dissolves via the reaction X(s)+H2O(l)→X(aq) and the temperature of the solution increases to 28.5 ∘C . Calculate the enthalpy change, ΔH, for this reaction per mole of X. Assume that the specific heat of the resulting solution is equal to that of water [4.18 J/(g⋅∘C)], that density of water is 1.00...

for the titration of 10.0 ml of .15 M HNO2 aqueous solution (Ka=7.2x10^-4) using 2.5 M...

for the titration of 10.0 ml of .15 M HNO2 aqueous solution (Ka=7.2x10^-4) using 2.5 M NaOH aqueous solution, consider the following points of the titration: A: Initial pH of .15 M HNO2 aqueous solution B: .1 mL added base C: 1/2 equivalence point D: Equivalence point E Excess base (assume added 100.0 mL of base) Set up the init mol, final mol, total volume, and ICE table for points B and D only: Point B: Titration equation: init mol:...

Subjects