1.Which of the following is an application of osmotic pressure?salting meats for preservationmixing

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1.Which of the following is an application of osmotic pressure?salting meats for preservationmixing water and ethylene glycol in antifreezepressurizing beverages with carbon dioxidesalting icy roadsusing a pressure cooker to increase the boiling point of water2.The Henry’s law constant for O2 in water at 25 °C is 1.66 ´ 10-6 M/mm Hg. What partial pressure of O2 is necessary to achieve an equilibrium concentration of 0.150 M O2?2.49 ´ 10-7 mm Hg6.23 ´ 10-6 mm Hg1.11 ´ 10-5 mm Hg9.04 ´ 104 mm Hg4.02 ´ 106 mm Hg3.An organic substance has an enthalpy of vaporization of 29.0 kJ/mol. The compound has a vapor pressure of 524 mm Hg at 25 °C. At what temperature is the vapor pressure equal to 115 mm Hg?-17 °C-9 °C9 °C25 °C4.What is the dominant intermolecular force or bond that must be overcome in converting CO2 from a liquid to a gas?London dispersion forcehydrogen bondingdipole-dipole forcecovalent bonding5.The lattice energy of KF is -821 kJ/mol. This energy corresponds to which reaction below?6.What is the mole fraction of 1.98 m Fe(NO3)3(aq)? The molar mass of Fe(NO3)3 is 241.9 g/mol and the molar mass of water is 18.02 g/mol.0.03450.06410.3240.4790.8637.Which of the following statements are CORRECT?1. Solubility is the concentration of solute in equilibrium with undissolved solute in a saturated solution.2. If two liquids mix to an appreciable extent to form a solution, they are immiscible.3. If two liquids mix completely in any proportion to form a solution, the resulting solution is supersaturated.1 only2 only3 only1 and 22 and 38.Which of the following compounds is expected to have the strongest ionic bonds?RbIRbFLiFCsBr9.What is the mole fraction of MgCl2 in a solution that is 11.04% by mass MgCl2(aq)? The molar mass of MgCl2 is 95.21 g/mol.0.022950.023490.11040.11601.30310.What mass of Cu(NO3)2 must be added to 1.00 kg H2O to prepare 97 ppm Cu2+(aq)?3.3 ´ 10-4 g5.2 ´ 10-4 g9.7 ´ 10-3 g0.033 g0.29 g11.Which of the following properties of water can be attributed to hydrogen bonding?1. high heat of vaporization2. high surface tension3. higher density of liquid versus solid1 only2 only3 only1, 2, and 312.Ideally, colligative properties depend only on theconcentration of solute particles in a solution.identity of the solute particles in a solution.color of a solution.hydrated radii of the molecules or ions dissolved in a solution.partial pressure of the gases above the surface of a solution.13.The specific heat capacity of silver is 0.235 J/g K. Its melting point is 962 C and its enthalpy of fusion is 11.3 kJ/mol. What quantity of heat in joules is required to change 5.00 g of silver from a solid at 25 C to a liquid at 962 C?2,300 joules345 joules1,620 joules902 joules14.What mass of NaCl must be dissolved in 65.0 grams of water to lower the freezing point by 7.50 °C? The freezing point depression constant, Kfp, for water is -1.86 °C/m.0.140 g15.3 g4.55 g8.19 g15.3 g15.Which of the following ions will have the lowest enthalpy of hydration?Na+Mg2+K+Ca2+16.To prepare 1.000 kg of 5.5% by mass KCl(aq), one may dissolve994.5 g KCl in 5.5 g of water.5.5 g KCl in 994.5 g of water.5.5 g KCl in 1000.0 g of water.55 g KCl in 945 g of water.55.0 g KCl in 1000.0 g of water.17.If the concentration of potassium chloride in water is 113 ppm, what is the molarity of potassium chloride in water? The molar mass of KCl is 74.55 g/mol. Assume the density of the solution is 1.00 g/mL.1.52 ´ 10-9 M1.19 ´ 10-4 M1.52 ´ 10-3 M8.42 ´ 10-3 M0.660 M18.At 25 °C, what is the osmotic pressure of 8.65 g urea (CON2H4) diluted with water to 1.50 L? (R = 0.08206 L·atm/mol·K)0.197 atm2.35 atm3.52 atm141 atm212 atm19.The heat of formation of KCl(s) is -436.7 kJ/mol and the heat of formation of KCl(aq, 1 m) is -419.5 kJ/mol. Determine the heat of solution of KCl.-856.2 kJ/mol-17.2 kJ/mol+1.041 kJ/mol+17.2 kJ/mol+856.2 kJ/mol20.What is the definition of molality?moles of solute per liter of solutiongrams of solute per kg of solutionmilligrams of solute per liter of solutionmoles of solute per liter of solventmoles of solute per kg of solvent21.What is the freezing point of a solution containing 4.78 grams naphthalene (molar mass = 128.2 g/mol) dissolved in 32.0 grams paradichlorobenzene? The freezing point of pure paradichlorobenzene is 53.0 °C and the freezing point depression constant, Kfp, is -7.10 °C/m.-1.63 °C44.7 °C46.9 °C51.9 °C52.1 °C22.The osmotic pressure of blood is 7.65 atm at 37 °C. What mass of glucose (C6H12O6, molar mass = 180.2 g/mol) is needed to prepare 5.00 L of solution for intravenous injection? The osmotic pressure of the glucose solution must equal the osmotic pressure of blood. (R = 0.08206 L·atm/mol·K)1.50 g54.2 g126 g271 g2270 g23.The Henry’s law constant for N2 in water at 37 °C is 8.2 ´ 10-7 M/mm Hg. What is the equilibrium concentration of N2 in water when the partial pressure of N2 is 634 mm Hg?1.3 ´ 10-9 M5.2 ´ 10-4 M1.9 ´ 10-2 M1.9 ´ 103 M7.7 ´ 108 M24.Which substance will most likely NOT quantitatively follow Henry’s law when dissolved in water?HeO2CH4N2NH325.Which of the following compounds is expected to have the strongest ionic bonds?MgOKBrNaIBaO

 
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