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The molecular-orbital diagrams for two- and four-atom linear chains of lithium atoms are shown in Figure. Construct a molecular-orbital diagram for a chain containing six lithium atoms and use it to answer the following questions.
(a) How many molecular orbitals are there in the diagram?
(b) How many nodes are in the lowest-energy molecular orbital?
(c) How many nodes are in the highest energy molecular orbital?
(d) How many nodes are in the highest-energy occupied molecular orbital (HOMO)?
(e) How many nodes are in the lowest-energy unoccupied molecular orbital (LUMO)?
An interstitial alloy prepared from two metals. metal A with the larger atomic radius has a hexagonal closed-packed structure. What if the formula(for example:A2B,AB,AB2)of the alloy if atoms of metal B occupy the following?
The active ingredient of aspirin is acetylsalicylic acid, a monoprotic with a ka = 3.3 x 10 raised to -4 power. What is the pH of a solution dissolving two aspirin tablets, each containing 325 mg of acetylsalicylic acid, in 250 ml of water
When 0.750 g sample of an unknown substance is dissolved in 20.0 g of benzene, the freezing point of the solution is 4.53 °C. What is the molar mass of the substance
Each molecule can also be in one of two orientations. What is the entropy of this system of molecules in boxes with two possible orientations.
the net atp yield for the complete oxidation of a single glucose molecule is 30 atp. phosphorolysis saves energy and
What is the freezing point (°C) of a solution prepared by dissolving 11.3 g ofCa(NO3)2 (formula weight= 164 g/mol) in 115 g of water? Assume that i=3.00 for Ca(NO3)2 and the molal freezing point depression constant for water is1.86°C/m.
The Ka of a monoprotic weak acid is 3.81 x 10^-3. What is the percent ionization of a 0.152 M solution of this acid
You are given a stock concentration of alcohol dehydrogenase (ADH). The molecular weight of ADH is 35,000 g/mol. What is the molarity of a 35 mg/mL stock solution of ADH
Given the following balanced equation: TiCl4 + 4NaH --> Ti + 4NaCl + 2H2. How many grams of NaCl will be produced from 15.0 g TiCl4 by using sufficent NaH
A sample of ideal gas at room temperature occupies a volume of 34.0 L at a pressure of 722 torr. If the pressure changes to 3610 torr, with no change in the temperature or moles of gas, what is the new volume, V2
What is the most common chemical method for removing H30+ ions in aqueous solution? Net equation for the solution?
What assumption did you make about the reaction of KMno4 solution and H2C2O4 solution in those determination that allowed you to consider k to be a constant
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