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When optically active 2,3-dibromobutane reacts with KOH , you end up with a pair of enantiomers. Explain by showing the structures of both the reactants and products. (Show the mechanism)
Draw the MOST stable CHAIR conformation of 1-bromo-2-methylcyclohexane. Explain in a one paragraph why what you have drawn is the most stable confromation.
What is the BOD concentration just downstream of the discharge point? (b) If the stream has a cross-sectional area of 10 m2, "what is the BOD concentration 50 km downstream? (BOD is removed with a first-order decay rate con- stant equal to 0.20/da..
Calculate the volume in mL required to provide 4.30g of ethanol ( C2H6O) from a 1.50M solution
question 1heroin is 3 6-diacetylmorphine. heroin is 2-3 times more potent than morphine.in vitro and in vivo to which
In Mexico, avocados are 125 pesos per kilogram. What is the cost in cents of an avocado that weighs 0.45 lb if the exchange rate is 11 pesos to the dollar
What would be the pH of a citrate buffer composed of 0.35 M citric acid (HCit) and 0.25 M sodium citrate. The Ka of citric acid
A close chemical relative of the banned insecticide DDT is methoxychlor (C16H15Cl3O2). Methoxychlor is currently used as a home insecticide. Calculate the mass percent of oxygen in methoxychlor.
2-methylbenzamide and 3-nitrobenzoic acid both have a melting point of 140.1 - 140.4 degc. however if you mixed them
A solution is prepared by dissolving 3.00 g of an unknown nonelectrolyte in 20.00 g of cylcohexane (tf = 6.6 oC and kf = 20.0 oC/m). What is the molar mass of the unknown compound if the solution has a freezing point of -6.4 oC
What is the effect of a temperature change from 205 K to 32 degrees Celsius and a pressure change from 2 atm to 101 kPa
A gas mixture contains helium and oxygen at respective partial pressures of 255 torr and 0.450 atm. What is the total pressure in mm Hg of the mixture?
consider the case of sulfurous acid which is quantitatively formed when sulfur dioxide gas dissolves in water.a without
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