When 0.650g of compound W is dissolved in 27.8g biphenyl (Kf= 8.0oC/ molal, fp= 70.0oC), the fp of the solution is 68.44oC. What is the MW of W?
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When 0.650g of compound W is dissolved in 27.8g biphenyl (Kf= 8.0oC/ molal, fp= 70.0oC), the fp of the solution is 68.44oC. What is the MW of W?
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- 1.Calculate the normality of the solutions containing 5.267g/L K2Cr2O7 (the Cr is reduced to Cr3+).(FW=294.19 g/mol) 2.A and B react as follows: A + B 2C. The equilibrium constant is 5.0 x 106. If 0.40 mol of Aand 0.70 mol of B are mixed in 1L, what are the concentrations of A, B and C after reaction? 3. The following data is given at a certain temperature:(1) 2N2 (g) + O2 (g) 2N2O (g) K1 = 1.2 x 10-35(2) N2O4 (g) 2NO2 (g) K2 = 4.6 x 10-3(3) ½N2 (g) + O2 (g) NO2 (g) K3 = 4.1 x 10-9Calculate the molar equilibrium constant, K for the reaction:2N2O (g) + 3O2 (g) 2N2O4 (g)1) How many grams of MnI2 are there in 244 grams of an aqueous solution that is 27.9%(w/w) MnI2? ____g 2) How many grams of iron (II) chloride,FeCl2,are required to make a 6.28%(w/v) aqueous solution in a 500.mL volumetric flask? ____gCalculate the enthalpy of solution for the dissolution of lithium iodide, LiI, molar mass = 133.85 g mol-1. When 1.49 g of LiI is dissolved in a coffee cup calorimeter containing 75.0 mL of water the temperature increased from 23.5 °C to 25.7 °C. The specific heat of water is 4.184 J g-1 °C-1, and assume the density of the solution is 1.00 g mL-1. -62 kJ mol-1 -39 kJ mol-1 30 kJ mol-1 -76 kJ mol-1 18 kJ mol-1
- The solubility of Cd(OH)2 in water at a certain temperature is 2.0 × 10–5 mol/L, (i.e., x). The Ksp value for Cd(OH)2 is5.0 grams of an unknown compound (non-electrolyte) was dissolved in 100 g of water. It was found to cause a 2 K change in the freezing point (kf = 1.86 K/m). What is the MW of the compound?The solubility of Ni(OH)2 in water at 25c is measured to be 4.9 x 10^-4 g/L. Use this information to calculate Ksp for Ni(OH)2.
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