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Unformatted text preview: The following plot shows the vapor pressure of various solutions of components A and B at some temperature. Which of the following statements is false concerning solutions of A and B? (Select all that apply.) 2. 4/4 points All Submissions Notes Question: ZumChem8 11.E.029. A solution of phosphoric acid was made by dissolving 10.0 g of H 3 PO 4 in 100.8 mL of water. The resulting volume was 105 mL. Calculate the density, mole fraction, molarity, and molality of the solution. Assume water has a density of 1.00 g/cm 3 . density g/cm 3 mole fraction molarity mol/L molality mol/kg 3. 2/2 points All Submissions Notes Question: ZumChem8 11.E.036. Calculate the molarity and mole fraction of acetone in a 1.01 m solution of acetone (CH 3 COCH 3 ) in ethanol (C 2 H 5 OH). (Density of acetone = 0.788 g/cm 3 ; density of ethanol = 0.789 g/cm 3 .) Assume that the volumes of acetone and ethanol add. molarity M mole fraction 4. /4 points Notes Question: ZumChem8 11.E.037. A 1.31 M solution of citric acid (H 3 C 6 H 5 O 7 ) in water has a density of 1.10 g/cm 3 . Calculate the mass percent, molality, mole fraction, and normality of the citric acid. Citric acid has three acidic protons. mass percent % molality mol/kg mole fraction normality N 5. 1/4 points All Submissions Notes Question: ZumChem8 11.E.040. (a) Use the following data to calculate the enthalpy of hydration for calcium chloride and calcium iodide. Lattice Energy H soln CaCl 2 ( s ) 2247 kJ/mol 46 kJ/mol CaI 2 ( s ) 2059 kJ/mol 104 kJ/mol H hyd , CaCl 2 kJ H hyd , CaI 2 kJ (b) Based on your answer to part (a), which ion Cl or I , is more strongly attracted to water?or I , is more strongly attracted to water?...
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This note was uploaded on 02/18/2011 for the course CHEM 114 taught by Professor Baker during the Spring '11 term at Cuny QCC.
- Spring '11