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A gas expands and does P-V work on the surroundings equal to 283 J. At the same time, it absorbs 216 J of heat from the surroundings. What is the change in energy of the system
Water/methanol and water/acetone are viable solvent systems for recrystallization, but water/chloroform and water/pentane are not
What is the change in chemical potential of any pure liquid when it vaporizes at its normal boiling point
Activating effects: Using resonance contributors, explain why the methoxy group is an activator and an ortho/para director in electrophilic aromatic substitution
a anaerobic bacteria living at the bottom of a shallow inlet to a salt marsh are generating hydrogen sulfide as a by
explain the earodynamics characteristics of margarine firmness and coefficient of friction important in agricultural engineering research and development.
Determine the [H+] and the pH of a buffer containing 0.20 M acetic acid and 0.10 M sodium acetate. 2. Calculate the percent dissociation of acetic acid in this solution
A particular diatomic molecule which contains H exhibits a 16.95 cm^-1 spacing between its rotational lines and bond length of 141.5 picometers. Determine the mass (in amu) of the unknown atom in the molecule.
calculate the mass of propylene glycol that must be added to .360 kg of water to reduce the vapor pressure by 2.87 torr
What is the major product when p-fluoroanisole reacts with sulfur trioxide and sulfuric acid. If applicable, minimize formal charges via expanded octets.
Weak acid unknowns with a solution of NaOH of about 0.10 mol/L.
Enough of a monoprotic acid is dissolved in water to produce a 0.0197 M. The PH of the resulting solution is 6.41. Calculate the Ka for the acid.
The optimal temperature for the action of lactate dehydrogenase is 36*C. It is irreversibly inactivated at 85*C, but a yeast containing this enzyme
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