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A 0.5M aqueous solution of hypobromous acid (for which Ka=2.3 * 10*-9) has what pH ? a. 6.78 b. 5.36 c. 4.47 d. 3.39 Please show the counting process.
A and B are stereoisomers. They are nonsuperimposable and are mirror images of one another. Which of the following best describes the relationship between A and B
what will happen if a small amount of HCl is added to a 0.1M solution of HF? a. the percent ionization of HF will decrease. b. Ka for HF will increase
Given that B(SiO) 640 kJ/mol, show that bond enthalpy considerations predict that silicon-oxygen compounds are likely to contain networks
Population ratio between two energy levels is 0.98. The space between the energy level is 0.625 meV. What is the system's temperature?
How does the second law explain why heat travels from a substance at higher temperature to one at lower temperature?
Which of the following is the most effective buffer system for a pH value of 4.45?
suppose the condenser operates as a total condenser at 40 degrees, the production rate of the overhead product is 75kmol/h. The ratio of reflux and overhead product is 1.5:1.
The Ksp value for the dissociation of barium nitrate is 0.00464. The molar solubility of barium nitrate is consequently 0.105 M. If the concentration of the barium ion in a saturated solution of barium nitrate was raised to 0.178 M (this is not th..
Which of the following molecules would a flame ionization detector (FID) be sensitive to after separation on a gas chromatography column?
How much potassium oxalate can be added to 158.0 mL of 0.35 M [Cu(NH3)4]Cl2 before a precipitate of CuC2O4 begins to form?
A study of the system 4NH3(g)+7O2(g)--2N2O4(g)+6H2O(g), was carried out. A system was prepared with [NH3]=[O2]=3.60 M as the only components initially.
Describe the preparation of 0.250 L of 50.0 mM lactate buffer, pH 4.5 using a 0.5 M solution of lactic acid and 0.5 M solution of sodium lactate. pka=3.9
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