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HCFC-123 has been proposed as a substance for CFC-11. Explain how would you expect the following environmental properties to compare?
(a) Tropospheric lifetime
(b) Combustibility
(c) Ozone-depletion potiential
Draw the structure of the aromatic organic product formed from the reaction of the following compound with
the vapor above a mixture of pentane and hexane at room temperature contains 35.5 pentane by mass. what is the mass
Calculate the mass, in grams for a gold sample that absorbs 225 J to change its temperature from 15 Celsius to 47 degrees celsius.
Tf will be negative and so you must use negative Kf values. Either way, the freezing point of the solution should be lower than that of the pure solvent. Assuming 100% dissociation, Find the freezing and boiling points of 1.85 m Na2SO4(aq).
What is the second ionization energy for a given element always greater than the first ionization energy
A specific proton in an organic compound has a chemical shift of 3.4 in 60 MHz spectrum. What will the shift be using a 90 MHz spectrum
You have 100 moles of solvent (not water). You have determined that 100g of dissolved sucrose incrases its boiling point temperature by 10C. For 100 moles of the pure solvent, how much mass (in grams) of salt
Compare lattice energies of LiI and PbI2 and calculate the formation enthalpy in each case by constructing a Born-Haber cycle. Which one is more ionic? Comment.
You require 36.78 mL of 0.0105 M HCl to reach the equivalence point in the titration of 25.0 mL of aqueous ammonia. What was the concentration of NH3 in the original ammonia 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.
find calories and joules lost when 75.0 g of water H20 cools from 86.4 degrees celsius to 2.1 degrees celsius.
what volume and mass of steam at 100 degress celsius and 1.00 atm would release the same amount of energy during
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