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For each of the subsequent molecules, offer a Lewis structure, comprising formal charge and resonance. Utilizing the table of bond enthalpies, along with the subsequent information, estimate? H°f for all of these molecules in the gas phase at 25°C.
a) H°f (C(g)) = +717 kJ/mol DC-Cl = 339 kJ/mol; a) CH3OH (methanol)b) COCl2 (phosgene) (Note- C is the central atom.) c) H2NOH (hydroxylamine) d) N2O4 (bonded like O2N-NO2)
it is observed that a volume of 29.15 mL of KOH was neede to complete the process of titration. Determine what is the concentration of this unknown HCl solution?
What would be a single reducing agent capable of reducing both the nitro and carbonyl groups of m-nitroacetophenone
a sample of the sugar d-ribose c5h10o5 of mass 0.727 g was placed in a calorimeter and then ignited in the presence of
if 0.00484 mol N2O effuses through an orifice in a certain period of time, how much NO2 would effuse in the same time under the same conditions ?
A reaction takes place at a constant pressure of 1.10 atm with an internal energy change of 71.5 kJ and a volume decrease of 13.6 L.
suppose a standardstrong-base solution was prepared by weighing out 1.934 g of naohin 500 ml of water. this solution
A 1.0 lambda L sample injected into a G.C. resulted in broad and tailing peaks in the chromatogram. Assuming that the column was appropriate for the sample, what two simple modifications could be made to improve peak width and shape
What is the de Broglie wavelength in cm, of a 11.9 g hummingbird flying at 1.12 102 mph? (1 mile = 1.61 km.)
when carbon is burned in the presence of oxygen the carbon and oxygen combine to produce carbon dioxide. if you start
A white precipitate is observed to form. (a) Write the full ionic equation for the chemical reaction including spectator ions: (b) Write the net ionic equation. (c) Write the name of the white solid
The melting points of NaF, NaCl, NaBr and NaI are 988, 801, 755 and 651 degrees Celsius, respectively. Are these data consistent with ideas developed in Section 12-5
in what type of material is the energy gap between the valence and the conduction band the greatest? na ge or diamond.
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