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Nitrogenase is an enzyme that converts N2 to NH3. Extraction procedures have shown that nitrogenase contains an iron-sulfur cluster, Fe4S4, where the atoms of each type are arranged alternatively at the corners of a cube. We wish to attempt to model the bonding in this iron-sulfur cube with the wave functions derived for an electron in a cubical (3D) box whose edges have length a; i.e., the Fe-S distance is a. Construct an energy-level diagram showing the relative ordering of the lowest 11 'molecular orbitals' of this cube. Label the levels in terms of their quantum numbers.
Calculate q,w,delta U and Delta H for each segment and for the cycle in which the direction of each process is reversed. In the graph all it says is the P initial =16.6 bar and Vinitial=1.00L and P final=16.6 bar and V final =25L
Calculate the work done on a 2500. kg car in accelerating it from rest to a speed of 100. km/hr.
Ethylene glycol, C2H6O2 (MW=62.1mol) has a density of 40.0 mass percentage and a solution of ethylene glycol in water is 1.0514 g/mL at 20 EC. Calculate the molality of the solution
How many moles of NaOH would be required to completely neutralize 37.22 mL of 0.25M HCl?
Important information about Imidazole. The imidazole ring system has a great deal of aromatic character. Can you formulate two resonance structures that account for the characteristics?
Suppose 50 mL of 0.020 M Hydhrochloric acid solution was mixed to 50 mL of 0.20 M acetic acid solution (Ka of acetic acid, CH3COOH, = 1.8 x 10-5). Determine the approximate pH of the mixture.
Calculate the pH of a buffer solution prepared by dissolving 0.200 moles of benzoic acid (C6H5COOH) and 0.450 moles of sodium benzoate (C6H5COONa in enough water to make 1.00 L of solution
find the number of moles of water that can be formed if you have 218 moles of hydrogen gas and 104 moles of oxygen gas
.850 L of 0.410 M H2SO4 is mixed with .800L of .240 M KOH. what concentration of sulfuric acid remains after neutralization
A chemist is commissioned to produce 50,000 liters of 0.550 M aqueous phosphoric acid. The chemist can purchase solid, 98.64% pure, phosphoric acid to dissolve in water. How many grams of this reagent are required?
Calculate the voltage of the cell 2Ag+(aq) (0.200 M) + Cu(s) Cu2+(aq) (0.080 M) + 2Ag(s) Eocell = 0.460 V
Determine how many moles of each Na+ and Cl- are in 1.00L of the saline solution?
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