Two-dimensional-three- dimensional models of ethane
What is the major difference between the two-dimensional and three- dimensional models of ethane and methane? When might you choose to use a two-dimensional model rather than a three-dimensional model when representing one of the molecules?
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A sample of gas is collected over water at a temperature of 35.0C when the barometer pressure reading is 742.) torr. What is the partial pressure of oxygen?
For a set of non-degenerate energy states with energy E/kB= 0, 100, 200K, calculate the probability of occupying each state when T=50, 500, and 5000K. As the temperature continues to increase, the probabilities will reach a limiting value. What i
Some reactions that are predicted by their sign deltaG to be spontaneous at room temperature do not proceed at a measurable rate at room temperature.
An unknown organic compound has the empirical formula C2H2O. A solution of 3.775 g of the unknown compound dissolved in 12.00 g of water is cooled until it freezes at a temperature of 4.72°C. Determine the molar mass and the molecular formula
Draw the chair form of rings A-C of cholesterol, and assign the hydrogens at the B/C ring-junction as equatorial or axial.
Why is an acetyl group added to aniline (making acetanilide) and then removed to regenerate the amine group in sulfanilamide?
A sealed balloon is filled with 0.50 L of helium at 23°C and 1.00 atm. The balloon rises to a point in the atmosphere where the pressure is 240. torr and the temperature is -33°C. What is the change in volume of the balloon as it ascends f
How would you distinguish between methyl benzoate and phenylacetic acid using 1H NMR spectroscopy?
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