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1-A molecular model of NO3- is shown below. Based on the best Lewis electron-dot structure for NO3- and formal charge considerations, what is the predicted N-O bond order for each N-O bond?
2 -How many resonance structures are there for SO3?
The distribution coefficient, k = (conc. in hexanes/ conc. in water), between hexanes and water for solute A is 7.5 . What weight of A would be removed from a solution of 10g of A in 100mL of water by a single extraction.
Consider the reaction of 25.0 mL of 0.20 M AgNO 3(aq) with 25.0 mL of 0.20 M NaBr(aq) to form AgBr(s) at 25 °C. What is ?G for this reaction? The K sp of AgBr is 5.0 x 10 -13 at 25 °C.
Give the full electron configuration (# electrons, quantum numbers for last electron added, orbital diagram, electron configuration) for each of the following
In a titration, a 0.7529 gram sample of a mixture of solid C6H5COOH and solid NaCl is dissolved in water and titrated with 0.150 M NaOH. The equivalence point is reached when 24.78 mL of the base solution is added.
Draw electron-dot formula and determine the shape for each of the following: a) NH4^+; b) O2^2-; c) COCl2 (C is the central atom); d) BCl3.
131I is readily available in Sacramento. Samples of 131I take 10 hrs to properly package and clear security before they are allowed to leave the site. Assuming that it takes 2 weeks to provide the safe ground transport to a clinic in Cleveland Ohi..
A sample of carbon dioxide has a volume of 575 mL at 752 torr and 22°C. What is the mass of carbon dioxide in this sample
Now consider a Rigid Rotator-Harmonic oscillator model for the HD molecule at temperature T=3 K. a) Where is each nuclei located relative to the center of mass in nm?
A 29.0-g sample of water at 290. K is mixed with 51.0 g water at 340. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
What volume of a 0.750 M solution of hydrochloric acid can be prepared from the HCl produced by the reaction of 25.0 g of NaCl with an excess of sulfuric acid
What is the change in entropy of a system consisting of one mole of ideal gas when it is expanded isothermally and reversibly from a pressure of 6 bar to 2 bar at 275 K? What is the change of entropy of the surroundings?
A helium balloon has a volume of 3.50L at 22.0 degrees celsius and 1.14atm . What is its volume if the temperature is increased to 30.0 degrees celsius and the pressure is increased to 1.20atm
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