need help! with work shown also! Free Response. Answer each question or solve each problem below....
Need help solving the calculationss. please show work on a seperae piece of paper and show all work. Background information. Experiment 1: Measure the Freezing Point of Pure Water 10 1. Volume of water (mL): 10 2. Mass of water (g): 3. Freezing Temperature (°C): 0 Experiment 2: Measure the Freezing Point of a Solution of an Unknown Substance 1. Mass of FP sample 1 (g): 2.00 si 2. Mass of sample and water (g): 12.000 3. Freezing Temperature (°C):...
Same Question and data but different parts. Please solve for all three. Last attempt left QUESTION 1 The data given in question-1 is used in the remainder of the postlab assignment questions. A 2.0 g of unknown material was dissolved in 9.00 mL of water (density of water = 1.0 g/mL) The freezing point of pure water is 0.00 °C and Kf of water is 1.86 °C/m. If the solution made above shows a new freezing point at -2.76 °C,...
I need help with problem 16. Not problem 16 under chapter 13 set 5. *9. 9. The vapor pressure of pure toluene, CyHx, is 137 torr at 60°C. What is the vapor pressure of toluene in a solution made by dissolving 25.0 grams of the nonelectrolyte glucose, C6H12O6, in 50.0 grams of toluene at 60°C? 10. The vapor pressure of water is 118 torr at 55°C. How many grams of urea, CO(NH2)2 must be added to 67.4 grams of water...
An aqueous CaCl2 solution has a vapor pressure of 80.2 mmHg at 50 ∘C. The vapor pressure of pure water at this temperature is 92.6 mmHg. What is the concentration of CaCl2 in mass percent? A hypothetical solution forms between a solid and a liquid. The values of the thermodynamic quantities involved in the process are shown in the following table. Action Enthalpy separation of solute 11.5 kJ/mol separation of solvent 21.8 kJ/mol formation of solute-solvent interactions -86.7 kJ/mol solute...
I need help in find the solution and understanding the work process behind solve the problems step by step. I would appreciate the help with these problems 1. What is the treezing point of a solution prepared by dissolving 20 g of NaCI (MW 58.4 g mol) in 150 ml. of water? The freezing point depression constant, K, for water 53.4 2. What is the osmotic pressure formed by dissolving 44 2 mg of aspirin (C,l1,0) in 0.358 L of...
(4 Points) Gasoline is primarily a mixture of hydrocarbons and is sold with an octane rating that is based on a comparison with the properties of isooctane (CsHis), which has an enthalpy of vaporization of 35.8 kJ/mol and a normal boiling point of 98.2 °C. Determine the vapor pressure of isooctane on a very hot day when the temperature is 38.0 °C. 1. (4 Points) A 15.0 mg sample of a protein was dissolved in water to produce 5.00 mL...
answer number 40, a and c with all work shown, the ka value for HF us 3.5 x 10^-4 each solut 39. Use the Henderson-Hasselbalch equal each solution a. a solution that is 0.135 M in HCIO and 0.155 M in KCIO b. a solution that contains 1.05% CH3NH, by mass and 1.10% CH NH;Br by mass c. a solution that contains 10.0 g of HC H2O2 and 10.0 g of NaC,H,O, in 150.0 mL of solution 40. Use the...
can some one help to solve the question 4 bellow. the answer is also bellow, show all work thanks solution: Obtain molar mass21100g/mol 4. When a 0.51 g sample of an isolated protein was dissolved in a 100.0 mL solution at 25 °C, the osmotic pressure against the buffer solution without protein was 4.5 mmHg. Determine the molecular weight of this protein. What was the concentration of protein (as a molarity) in the solution?
need #7-10 answered 6. The solubility of nitrogen gas at 25°C and a nitrogen pressure of 522 mmHg is 4.7 x 10 mol/L. What is the value of the Henry's Law constant in mol/L-atm? A) 6.8 × 10-4 mol/L-atm B) 4.7 x 10 mol/L-atm C) 3.2 × 104 moVL-atm D) 9.0 x 10 mol/L atm E) 1.5 x 10mol/L atm 7. According to Raoult's law, which statement is false? A) The vapor pressure of a solvent over a solution decreases...
6.16 Classify each of the following solutes as an electrolyte or a nonelectrolyte a. NaNO3 b. C6H12O6 c. FeCl3 6.26a Calculate the composition of 20.0 g acetic acid dissolved in 2.50 L in mass/volume% 6.28b Calculate the %m/m composition of 50.0 g KCl in 5.00 x 102 mL solution (d=1.14g/mL) 6.30a How many g of solute are needed to prepare 2.50x102 g of 5.00% (m/m) NH4Cl? 6.34 How many mL of 4.0 mass/volume % Mg(NO3)2 solution would contain 1.2 g...