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Why do you think the enthalpy of activation, H ‡ , for a syn-periplanar elimination is higher than that for an anti-periplanar elimination?
A student is asked to prepare a buffer solution at pH=8.60 using one of the following weak acids HA (kA=2.7*10^-3), HB (Ka = 4.4*10^-6) and HC (Ka = 2.6 *10^-9).
The analysis was completed by titrating the excess acid with 11.37 mL of 0.1080 M NaOH. How many of these tablets represent a proper dose for patients whose weight is 100 lb (assume that 1 pound, lb, is 0.45 kg).
use the concept mof electron configuration to explain why the number of valence electrons in metals tend to be less the number in most nonmetals.
Match the element to the subshell containing unoccupied or partially occupied orbitals. Rubidium Vanadium Boron Uranium Tungsten Magnesium A. 5d B. 2p C. 5f D. 3s E. F. 4s G. 3d H. 4d I. 5s J. 2s K. 4p
Many power plants produce energy by burning carbon-based fuels, which also produces carbon dioxide. Carbon dioxide is a greenhouse gas, so over-production can have negative effects on the environment. Use enthalpy of formation data to calculate th..
Two students measure the density of gold. One works with a 100-g bar of pure gold. The other works with a 200-g bar of pure gold. Which student measures the larger density.
A helium-filled weather balloon has a volume of 2.4 × 102 L at 99 kPa pressure and a temperature of 0°C. What is the mass of the helium in the balloon?
negative or about 0. For each, indicate whether the process is always spontaneous, never spontaneous, spontaneous at high temperature or spontaneous at low temperature.
What volume (in milliliters) of 0.190 M NaOH should be added to a 0.135 L solution of 0.022 M glycine hydrochloride
Calculate the mass of propylene glycol that must be added to 0.360 of water to reduce the vapor pressure by 2.88 torr at 40°C (Pressure of H2O is 55.3 torr at 40°C ).
The atomic mass of Potassium 39 is 38.96371 AMU. Calculate the binding energy for a mass of this nuclide using 1.008665 AMU for the mass of the neutron, 1.007276 AMU for the mass of the proton, 0.00054858 AMU for the mass of the electron
Describe four different potential pathways that can utilize pyruvate as a substrate. Show all of the pathways (draw them out) and what the final fate of pyruvate is in the respective pathway
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