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Describe the variational principle. Explain how itprovides the foundation for most modern quantum mechanicalcalculations of chemical importantce. How is it that advances incomputer memory and processor speeds have made it possible to getuseful approximate solutions to system big enough to be of interestin Chemistry?
determine the adiabatic flame temperature when gaseous propane at an equivalence ratio of 0.5 and at 25c is burned in a
Calculate the minimum wavelength of light (in nm) that could break an oxygen-oxygen double bond given that it takes 499 kJ to break on mole of these bonds.
What's the volume of CO2 generated from 7.5 grams of sodium hydrogen carbonate and excess hydrochloric acid at standard temperature and pressure
An infant ibuprofen suspension contains 100 mg/5.0 mL suspension. The recommended dose is 10mg/kg of body weight.
A 2.15 g sample of white solid was vaporized in a 345 mL vessel. If the vapor has a pressure of 985 mmHg at 134°C, what is the molecular weight of the solid
A 5.326 g sample of an unknown compound is found to contain 3.758 g of carbon, 0.316 g of hydrogen, and 1.251 g of oxygen. What is the empirical formula of this substance
The solubility of barium hydroxide in water at 20 degrees Celsius is 1.85g/100 water. a solution is made up of 256 mg in 35.0 g of water. is the solution saturated. if not . how much more barium hydroxide needs to be added to make a saturated solu..
Draw viable Lewis structures to illustrate how the element bromine can take part in an ionic bond, a pure covalent bond, and a polar covalent bond.
K = 0.040 for the reaction below at 450C. If the reaction starts with .20M Cl2 and .20M PCl3 what concentration of PCl5 will be present at equilibrium PCl5(g) PCl3(g) + Cl2(g)
Propose a method to accurately measure the melting point of vegetable oil both before and after hydrogenation. Keep in mind that it will be too thick and greasy to insert in a capillary tube
the recrystallization is slow typically the flask is closed with a cork. What do you think is the reason for using a cork and not a plastic stopper (which would seal the flask better)
A sugar syrup solution contains 15.0% by mass of sucrose C12H22O11. The syrup has a density of 1.06 g/ml
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