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Calculate the lattice energy of calcium chloride given that the heat of sublimation of CA is 121 kJ/mol and enthalpy of formationof CaCl2 = -795 kJ/mol.
these three particles which would require radiation of the lowest wavelenth to excite its electron from the ground state to the second energy level?
compare alkalide ion with the neutral alkali atom.under appropriate conditions alkali metals a can be reduced to yield
Suppose we want a soln containing 150 micrograms of the protein at a concentration of .5 mg/ml. To do this we will first evaporate the liquid from enough of the protein soln to get 150 micrograms. How much coln do we need to start with. How much H..
Approximate the heat of reaction for the following equation using thermodynamic tables: CuO (s) + AgNO3 (aq) ? Cu(NO3)2 (aq) + Ag2O (s) hint: Write the net ionic equation first.
how many grams of ammonium nitrate are necessary to form 0.852 moles water.
calculate the volume of air at 30 degrees celcius and 1 atm that is needed to burn completely 10 grams of propane. assume that air is 21 percent oxygen by volume
A dilute solution containing 5 ppm of solute has a density of 1.00 g/ml. Express the concentration of the solute in g/L, ug/mL and mg/L.
what is the purpose of dissolving the acetanilide in glacial acetic acid prior to beginning the nitration reaction?
A 6.5g sample of diprotic acid requires 137.5mL of a .75M NaOH solution for complete neutralization. Determine the molar mass of the acid.
What is the maximal amount of lead (II) iodide (the theretical yield) that can be obtained when 0.75 moles of lead (II) nitrate and 83 g potassium iodide are mixed together
Determine the amino acid sequence of a heptapeptide from the following data. Briefly explain the meaning of the results in each of the following treatments.
equilibrium constant Kc for the reaction: H2 (g) + CO2 (g) - H2O (g) + CO (g) a) in one experiment, a container is introduced in a mixture formed by the four shown in the reaction gases
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