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You have a aqueous solution of NaCl that has a freezing point of -9.35°C. Assuming a...
3 ques need help plez For the reaction 3 A + 4B → 2C + 4 D, what is the magnitude of the rate of change for [B] when [C] is increasing at 2.0 M/s? M/S Calculate the atomic mass of the magnesium-27 nucleus in amu (to three decimal places) assuming that the mass of a nucleon is 1.008 amu and the binding energy per nucleon is 1.326x10-12 J/nucleon. (1 kg = 6.022x1026 amu) amu You have a aqueous solution...
An aqueous solution containing sodium chloride has a freezing point that is -1.28 degrees C at 1.0 atm. What is the % by mass of NaCL in this solution? HINT: The Kf for water = 1.86 degrees C kg/mol
3 ques plz help thank you The cathode compartment of a copper concentration cell contains 0.500 L of 1.00 M [Cu2+] solution while the anode compartment contains 0.950 L of 0.0500 M. [Cu2+] with a copper electrode in each compartment. How many Coulombs of electric charge can the cell produce before the compartments reach equilibrium at 25°C? | C Calculate the atomic mass of the magnesium-27 nucleus in amu (to three decimal places) assuming that the mass of a nucleon...
5) At what temperature would a 1.55 m NaCl solution freeze, given that the van't Hoff factor for NaCl is 1.9? Kf for water is 1.86 .C/m. The freezing point for pure water is 0.0 °C and Kf is equal to 1.86 °C/m.
please help!!!! For the following reaction 2NO2(g) = N204(9) AH° = -58.02 kJ/mol and AS° = -176.6 J/mol K. What is AG for the reaction at 45.0°C when P_NO2 = P_N204 = 0.200 atm? Assume AH° and ASº are temperature independent. ple For the electrochemical cell 2 Al(s) + 3 Mn2+(aq) + 2 Al3+ (aq) + 3 Mn(s) (E° = 0.48 V, [A13+] = 1.0 M), what is the value of E when [ Mn2+] = 0.016 M? Assume Tis...
Calculate the molality of an aqueous solution of KBr whose freezing point is -4.95 degrees celsius. The Kf of water is 1.86 degrees C/m. Calculate the ideal Van't Hoff factor for KBr? Show work
Freezing point depression can be used to experimentally determine the van't Hoff factor of a solute in solution. Given the data in the table, please answer the questions below and determine the "real" van't Hoff factor of the solute. Experimental Results Mass of solvent (water) Freezing point of water Freezing point depression constant (Kf) of water Mass of solution Freezing point of solution 8.515 g 0.00°C 1.86°C/m 9.3589 -5.45°C a. What mass of solute was used? b. What is the...
van't Hoff Factor Chem 202 Freezing Point of Aqueous Solutions Results Experimental freezing point values determined from graphs (sce directions on p. 3-5, steps 2,3): Sample Ty measured /°C AT measured / °C Distilled Water (solvent) -0.1°C Follow your instructor's Solution D (Naci) -1.8°C 1.7°C directions for submitting these values Solution G (lalla) -1.0°C 0.9°C before you leave lab! van't Hoff factor values (see directions on p. 3-6, steps 4-5): Solution D Solute Compound Naci Molality 0.505 mol/kg Ideal van't...
Colligative properties, such as boiling point elevation, depend on the number of dissolved particles in solution. For nonelectrolytes, no dissociation occurs, and so you can use the number of moles of solute to calculate both molality and molarity. In contrast, electrolytes dissociate, and therefore the molality and molarity must be calculated based on the number of moles of dissociated particles or ions. There are two ions per formula unit of NaCl. Therefore, we would expect the freezing-point depression ΔTf of...
At what temperature would a 1.40 m NaCl solution freeze, given that the van't Hoff factor for NaCl is 1.9? Kf for water is 1.86 ∘C/m . Express your answer with the appropriate units.