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Write down and explain the feature(s) in the Schrödinger equation that lead to the "electron correlation problem". Next, explain the approximation(s) that lead to the introduction of effective nuclear charge (Z Effective). Be sure to define effective nuclear charge in your discussion and explain the role and physical significance of the shielding (screening) constant (s).
Calculate the number of moles of solute present in each of the following solutions: a)245 mL of 1.50 M HNO3 b) 50.0 mg of an aqueous solution tha tis 1.25 m NaCl c) 75.0 g of an aqueous solution that is 1.50% sucrose by mass
A sample of gas is collected over water at c and mm Hg. The collected gas occupies 130 mL. The vapor pressure of water at 23.5 c is 21.7 mm Hg. The approximate molecular weight of this gas
A concentration cell consists of two Ni / Ni2+ electrodes. The electrolyte in half-cell A is 0.50 M and the electrolyte in half-cell B is 0.0025 M. Which combination below correctly pairs the anode and the cell voltage
NH3 and NH4+ are used to create a buffer solution. When a base is introduced into this buffer, which of NH3 and NH4+ reacts with the base to maintain the pH of the solution
Calculate the volume of 0.0300 M Ce4+ required to reach the equivalence point when titrating 41.0 mL of 0.0200 M C O2 2-4 (oxalate ion).
The acid dissociation constant (Ka) of caffeineH+ is Ka = 0.25 M. If a cup of tea has a pH of 7.6, what should be the ratio of concentrations of caffeineH+ to unprotonated caffeine in the tea
in a collision of sufficient force automobile air bags respond by electrically triggering the explosive decomposition
A vessel with a volume of 23.1 L contains 2.80 g of nitrogen gas, 0.403 g of hydrogen gas, and 79.9 g of argon gas. At 25 deg celsius, what is the pressure in the vessel
Predict the physical state of ammonia at -95 degrees C (mp =-77degrees C, Bp =-33 degrees C) and normal atmospheric pressure.
Upon decomposition one sample of magnesium fluoride produced 1.66 kg of magnesium and 2.57 kg of fluorine. A second sample produced 1.38 kg of magnesium. How much fluorine did the second sample produce
For a substance such as carbon dioxide or water, calculate and graph the phase boundaries in the solid vapor, solid liquid, and liquid vapor regions
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
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