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Consider a bonding electron in a diatomic molecule from the molecular orbital point of view. If the probabilities of finding the electron in atomic orbitals Wa and Wb are 0.25 and 0.75, respectively, what is the LCAOwavefunction for the electron (Neglect overlap)
a solution of ethanol c2h5oh in water is prepared by dissolving 90.0 ml of ethanol density 0.79 gcm3 in enough water
a gas expands against a constant external pressure of 0.9 bar until its volume has increased from 6.8 l to 10.4 l.
After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 19.0732 g. Assuming that only the magnesium carbonate had decomposed, how much magnesium carbonate was present in the original sample
How many grams of water can be cooled from 34°C to 11°C by the evaporation of 85 g of water? (The heat of vaporization of water in this temperature range is 2.4 kJ/g. The specific heat of water is 4.18 J/g-K.)
A patient is given 0.055mg of technetium -99m, a radioactive isotope with a half-life of about 6.0 hours.
What amount of HCl gas must be added to 1.00 L of a buffer solution that contains [acetic acid]=2.0M and [acetate]=1.0M in order to produce a solution with pH= 4.16
What is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? Calculate the wavelength of the 4 ---> 3 transition.
What mass of sucrose, in grams should be combined with 531g of water to make a solution with an osmotic pressure of 8.95atm at 315K
What is the ionization state of aniline (protonated, deprotonated, or a mix) at pH 1, 4.6, and 14?
explain the hazards associated with 1.0M CH3COOH solution, 0.10M BaCl2 solution and 0.10M Na2C2O4 solution.
a 100 g sample of water at 23C is added to a 45 g sample of water at 99C. what is the final temperature of the sample
What was the purpose of using aq. NaOH in aldol condensation lab? A. It acts as an electrophile on which an enolate ion can attack B. It acts as a nucleophile which can attack an electrophilic carbonyl carbon.
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