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Given that the partial pressure is 7.0x10^-4 atm, what is the pH of water at equilibrium with the atmosphere?
K = 0.032
A chemist titrates 100 ml. of .020 M aqueous ammonia solution with .10 M HCl at 25 degrees C. What is the pH of the solution after 20 ml of HCl have been added to the solution?
A student wanted to determine the molar concentration of acetic acid in a commercial vinegar sample. He used a volumetric pipet to deliver 3.00 mL of vinegar to an Erlenmeyer flask, added about 30 mL of water and 3 drops of phenolphthalein indicat..
Compare lattice energies of LiI and PbI2 and calculate the formation enthalpy in each case by constructing a Born-Haber cycle. Which one is more ionic? Comment.
Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes
what is the underlying electronic reason for all periodic trends?
Calculate the number of oxygen molecules per liter of air if the temperature and pressure were 25°C and 1.00 atm, respectively.
A solution is prepared by mixing 4 ml of .20 M NH3, 1 ml of .20 M HCl, and 5 ml of water. Calculate the concentration of NH3 and NH4+ in the final diluted solution.
Calculate the equilibrium constant Kp for the reaction, {rm SO_2 (g) + 2 H_2S (g) rightleftharpoons 3 S(s) + 2 H_2O(g)} at a temperature of 298 rm K
Identify and discuss three key features associated with the combustion of polymeric materials or compounds that are relevant to the safety
what are the relative energies of the orbitals defined by n=4? if this atom is placed in a magnetic field, how would the relative energies of these orbitals change and why
What are the products of a single displacement reaction involving hydrochloric acid and magnesium
If the enthalpy change for the reaction is 21 kJ/mol, what is the minimum value of the change in entropy for the reaction. Please answer in J/K* mol
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