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Draw the Newman projections for the anti and gauche forms of 1,2-dibromoethane. The molecule has a dipole moment of 1.0 D.
a) Which form is responsible for the molecular dipole (gauche/anti)?
(b) Which conformation of 1,2-dibromoethane is present in the greatest amount at equilibrium (eclipsed/gauche/anti) (Hint: you always have more of the lower energy species at equilibrium)?
(c) Which of the following compounds has the larger energy barrier to internal rotation about the central bond? And why?
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A fossil fuel containing 84% C, 15% H and 1%S is burned with 20% excess air in a boiler. The stack gases are at 150 C. a) What is the concentration (ppm) of SO3 in the stack if equilibrium is established according to
a. A 0.1044 gram sample of an unknown monoprotic acid required 22.10 mL of 0.0500 M NaOH to reach the end point. What is the molar mass of the unknown?
If a raindrop weighs 57 mg on average and 5.1 X 10^5 raindrops fall on a lawn every minute, what mass of rain falls (in kg) on the lawn in 1.5 hours?
what product and how much of it would you obtain if you heated 1.0mL of ethanol with 2.0 mL of glacial acetic acid in the presence of a few drops of sulfuric acid?
O2 gas is held over a container of water. If the total pressure of the gas mixture is 10.2 atm, what is the concentration of dissolved He in the water?
Calculate delta g rxn and e cell for a redox reaction with n=3 that has an equillibrium constant of K
This reaction is a catalytic hydrogenation that only partially reduces an alkyne. Consider whether the hydrogenation
Oleum or fuming sulfuric acid available commercially in concentrations ranging from 20 to 99.9% sulfur trioxide.
Calculate the mass of hydrogen per oxide needed to obtain 0.460 L of oxygen gas at STP. 2H2O2(aq) → 2H2O(l) + O2(g).
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