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Utilize the Kapustinskii equation for lattice energies as well as an appropriate Born-Haber cycle to compare the energies of formation of PbO and PbO2.
Consider the bonding and bond order in H2 +, H2, He2 +, and He2 to explain the bondlengths of 106 pm, 74 pm, 108 pm, ~6000 pm, respectively.
The formation constant of a complex ion [M(NH3)4]2+(aq) is 3.8E8. If a solution is prepared by adding 0.6 mol of [M(NH3)4]Cl2 to 275.0 mL of water, what is the equilibrium concentration of free M2+(aq) ions?
Calculate the heat released when 72.0g of steam at 131C is converted to water at 44.0C. Assume that the specific heat of water is 4.184J/gC, the specific heat of steam is 1.99J/gC and delta H of vaporization is 40.79kJ/mol for water.
We are given an unknown antacid pill and through the procedure in this lab we determine its cost effectiveness to be 5.0x10-1 mole of acid/$. Can we also determine the number of moles of base in the pill
a 265- flask contains pure helium at a pressure of 761 . a second flask with a volume of 490 contains pure argon at a
Using the equation E0cell = E0cathode - E0anode, and the reference value of E0 for Cu(II)/Cu(s) for the role that copper plays in this overall cell reaction, determine the value of the standard potential for the half-reaction Zn2+(aq) + 2e- -> Zn(..
What is the density of a substance if a 2.50mL sample has a mass of 0.880g at room temperature? ( show calculations) What is the specific gravity of the substance?
All of the carbon atoms in the ring of carbon atoms of the benzene molecule are double bonded to each other. All of the carbon atoms in the ring of carbon atoms of the benzene molecule are single bonded to each other.
How to calculate ion mobility of DNA as well as single molecule of dNTP? This calculation would be further used for conductivity of DNA or dNTP in solution.
what mass of each substance will be found in the room? State whatever assumptions were necessary in order to complete this problem.
Describe, in detail, how you would separate a mixture of ammonium chloride, NaCl, and sand. Will you be using chemical methods. Explain.
Solid aluminum can be separated from molten AlCl3 by reduction. How many grams of Al(s) would be obtained by passing a current of 14.1 A through molten AlCl3(s) for 2.77 hr.
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