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What are he difference between sigma and Pi bonds, and how are they used?
The vapor pressure of water at 20degrees Celcius is 17.5 mmHg. What is the vapor pressure of water over a solution prepared from 2.00x10^2g of sucrose(C12H22O11) and 3.50x10^2g water
Combustion of natural gas (primarily methane) occurs in most household heaters. The heat given off in this reaction is used to raise the temperature of the air in the house.
When 50.0 mL of a 0.3000 M AgNO3 solution is added to 50 mL of a solution of MgCl2, and AgCl precipitate forms immediately. The precipitate is then filtered from the solution, dried, and weighed.
The critical constants of ethane are Pc = 48.20 atm, Vc = 148 (cm^3)/mol, and Tc = 305.4 K. Calculate the van der Waals parameters of the gas, and estimate the radius of the molecules.
What volume and mass of steam at 100 degrees celsius and 760 torr would release the same amount of energy as heat during condensation as 65.5 cm(cubed) of liquid water would release during freezing?
A piece of Al(s) at 94°C is placed in 65g of H2O at 28°C. The Aluminum cools and after equilibrium the final temperature of Aluminum and water is 38°C. What was the mass of the aluminum?
A pound of coffee beans yields 50 cups of coffee (4 cups = 1 qt). How many milliliters of coffee can be obtained from 5 g of coffee beans?
Explain what d-electron configurations as well as spin states are characteristic of some of the most stable octahedral complexes. Why.
Calcium sulfide has a face-centered cubic unit cell with calcium ions in octahedral holes. If the radius of sulfide ion is 184pm and the density of CaS is 2.60 g/cm3.
Treatment of A with aqueous H2SO4 and Hg(II) gives a single ketone, C, C10H16O. Oxidation of A with KMnO4 gives CO2 and the keto carboxylic acid D shown below. Propose a structure for A.
If Ka for an acid, HA, is 0.00177, what is the pH at one half the equivalence point for a titration of 50.00 mL of 0.100 M HA with 0.100 M NaOH
The radioactive decay of thallium-206 to lead-206 has a half life of 4.20min. Starting with 4.10 x 10^22 atoms of thallium-206
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