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1. Both oxygen and sulfur form gaseous, triplet ground-state, diatomic molecules. Simple molecular orbital theory predicts a bond order of 2 for both molecules. Unlike molecular oxygen, molecular sulfur is unstable with respect to the formation of other allotropic forms, all of which consist of polymeric or cyclic molecules in which each sulfur atom is bonded to two other sulfur atoms by single bonds. The most corlmon of the sulfur all otropes consists of S8, a cyclic molecule with the structure shown below.
Explain why diatomic sulfur is unstable relative to formation of olisomeric/oolvmeric species involving only single bonds, whereas oxygen is stable. Response must includes rationales for the relative stengths of homonuclear oxygen and sulfur σ and ∏ bonds.
When acetaldehyde is reacted with 3 equivalents of formaldehyde under alkaline conditions, followed by treatment with sodium borohyfride, the product formed shows the following spectrum: IR: broad peak at 3326cm -1; H NMR: singlet at3.45. Singlet ..
KEtones also undergo the aldo condensation, although a succesful reaction often requires "enhanced" conditions, since the addition involves an unfavorable equilibrium constant.
The acceptable limit for mercury in drinking water is 2ppb. Does this correspoond to mercury in its elemental form (Hg) or in its ionic form (Hg^2)
Describe two different ways by which electrons can move from the valence band to the conduction band.
explain why the chemical formulas AlCl3, PCl3 and CoCl3 are so similar, yet their names are so different.
What is the standard reaction enthalpy for which the equilibrium constant is doubled when the temperature is increased by 10 C at 298 K
The correct sequence steps that will result in the synthesis of 1,2-dichloropropane using acetylene and any alkyl halides as starting materials is
Calcium hydroxide reacts with carbon dioxide to form calcium carbonate. The reaction for this process is: Ca(OH)2(s) + CO2(g) ? CaCO3(s) + H2O(g), ?H = -69.1 kJ What is the enthalpy change if 380 g of calcium carbonate is formed
given the unbalanced equation ag2co3 yeild ag o2 co2 how many moles can be produced from 2.5 moles of ag2co3in a
a coach inflates a football to the required gauge pressure of 13 lbin2 prior to a championship game. the football has
What is the pH of a 25.00 mL solution of 0.10 M CH3CO2H? What are the concentrations of OH- and CH3CO2? Ka = 1.8 x 10^-5
Hypohalic acid, HOX, is a weak acid with a Ka of 3.341x10-8. What is the pKb for the hypohalite anion, OX-, in a 0.8865 M solution of KOX
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