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Can the solubilities of lead formate Pb(CHO2)2(pKso=6.70, pKa=3.75) and copper iodate Cu(IO3)2(pKso=7.13, pKa=0.79) be made equal by adjusting pH? If so, at what pH value are the solubilities equal? How does this pH value depend on the ionic strength?
The mole fraction of oxygen molecules in dry air is 0.2095. What volume of dry air at 1.00 atm and 25°C is required for burning 1.00 L of hexane (C6H14, density = 0.660 g/mL) completely, yielding carbon dioxide and water
Consider the titration of 50.0 mL of 0.20 M NH 3 (K b =1.8×10 ?5 ) with 0.20 M HNO 3 . Calculate the pH after addition of 50.0 mL of the titrant.
Calculate the wavelength of the photon emitted when an electron makes a transition from n=4 to n=3 . You can make use of the following constants
a robust first grader goes for swimming lessons three times a week and he enjoys it thoroughly. during the first week
If 18.1mL of 0.800M HCl solution are needed to neutralize 5.00mL of a household ammonia solution, what is the molar concentration of the ammonia
Under what conditions would you expect a real gas to be (a) more compressible than an ideal gas; (b) less compressible than an ideal gas
Balance the following electrochemical equation for an acidic environment. NO3- + Cu à NO + Cu2+. Balance the following electrochemical equation for a basic environment. Cl- + Ag+ à Ag + ClO2-
to calculate approximately the ability of ibuprofen to move through different tissues in the body pharmacologists
Write a balanced chemical equation for the following reaction in an acidic solution. Cr2O72-(aq)+Br-(aq)>>Cr3+(aq)+Br2(aq)
The iron content of hemoglobin can be determined by converting the iron to Fe2+ and titrating using MnO4 -. A 5.0 g sample of hemoglobin requires 21.6 mL of 0.00310 M potassium permanganate. What is the percent of iron in the hemoglobin sample?
Calculate the max wavelength of light (in nm) required to ionize a single lithium atom, knowing that the ionization energy of lithium is 520 kJ/mol
In tables of thermodynamic data provided in chemistry books, one finds delta Hf, delta Gf, and delta S listed. Briefly explain why the entropy data are supplied as S
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