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Dissolving 4.49 g of CaCl2 in enough water to make 252 mL of solution causes the temperature of the solution to increase by 3.77 oC. Assume the specific heat of the solution and density of the solution are the same as water?s (about 4.18 J/goC and 1.00 g/cm3, respectively) Calculate ?H per mole of CaCl2 (in kJ) for the reaction under the above conditions. Aside, the ?H per mole for dilution depends on the process. For example, more energy is released when starting with a large volume of water (infinite dilution), than when starting with a small volume of water. Why do you think this happens? (Find the heat released per gram and convert to per mole using the MM. Is the process exothermic? If, yes, then what is the sign for ?H?)
calculate the heat released when 166g of water at 23 degrees celcius is converted to ice at negative 10 degrees celcius
Element Z has two naturally occurring isotopes Z-79 ( 78.918 amu) and Z-81 (80.916 amu) . Calculate the atomic mass of element Z given the abundance of the Z-81 is 49.31 %
Addition to double bonds, oxidation of double bonds - Draw the structure/structures for the major organic product/products formed when 1-methylcyclohexene reacts
Calculate the [HNO3] in each aqueous solution at 25C and classify each solution as acidic or basic
What is the molality of a solution in which 25 g of sodium chloride is dissolved in 2.0 kg of water
The tabulated mass of Cl is 35.45 amu. The two dominant isotopes of naturally occurring Cl are 35Cl (34.97 amu) and 37Cl (36.97 amu).
65.50 mL of 0.161 M HF is titrated with 0.1200 M NaOH. What is the pH at the equivalence point.
Calculate the probability of finding an electron that is described by this wavefunction in a volume of 1.0 pm3 (i) centred on the nucleus.
If the minimum energy required to break the C-Cl bond in CF3Cl is 540 kJ/mol, what is the longest wavelength of radiation that will break this bond?
What is the solubility of nitrogen in the divers blood at the bottom of the dive? b: If you assume the mass of the divers blood is 5.0 kg, how many moles of nitrogen comes out of the divers blood when he comes to the surface?
Calculate the concentrations of all species in a 0.750 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10-2 and Ka2 = 6.3× 10-8.
The limiting current of lead in an unknown solutions is 5.60μA. one mL of a 1.00 x 10-3M lead solution is added to 10.0mL of the unknown solution
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