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Q. A 100.0 mL sample of 0.10 M NH3 is titrated with 0.10 M HNO3. Compute the pH of the solution before the addition of any HNO3. Kb of NH3 =1.8 × 10-5.
Q. if citrate is combined to a concentration of 0.145M with no change in volume then calculate What is the pH change of a 0.270M solution of citric acid (pKa=4.77)
15.0 moles of gas are in a 5.00L tank at 22.2°C. compute the difference in pressure between CH4 and an ideal gas under these circumstances. The van der Waals constants for CH4 are a=2.300L2⋅atm/mol2 and b=0.0430 L/mol.
Integrals for some of the resonances in the 1H NMR spectrum are higher than they should be due to the shear number of hydrogens in this compound
What happened when 6.0M HCl was added to the contents of the tube in 7a above?
Calculate how much heat is required to added or removed to convert 100.0 g of steam at 115 0C to liquid water at 65 0C?
Evaluate the electronic configuration for ionization energies of Magnesium, the orbital number in which the electrons are added in phosphorus ion, and the one will lose in the ionization of Alluminium.
Find molarity, molality, percentage composition, boiling and freezing point of a solution - What are the boiling and freezing points of the solution?
Calculate brightness of a wavelength undergoing Rayleigh scattering.
Find out the exact significant figures for each of the values - Indicate the number of significant figures
Identify the orbitals to which a 4d electron may make an emission transition in the hydrogen atom and determine the dissociation energy of the molecule
Gas stoichiometry and Percentage of calcium carbonate in the sample
What will be the resultant pressure when the stopcock is opened?
Quantum number representations - What are the possible values of the four quantum numbers for one electron in a 5d orbital?
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