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A collection of electrons is confined to an infinitely deep well or 1-D box having a 4 nm width. What wavelength photon in micrometers and nanometers when absorbed by an electron in a n=3 level will cause the electron to undergo a transition from n=3 to n=9 energy level?
Suppose one wated to take another approach where C is heated until 5% of the atoms occupy the electronically excited state. Consedering only the lowest-energy ground state and the elctronically excited state
Calculate the vapor pressure of a solution made by dissolving 75.9 g of urea (molar mass= 60.06 g/mol) in 197.5 mL of water at 35C. (Hint: the vapor pressure of pure water at 35C is given
How to determine if HCl is Hydrochloric acid or Hydrogen chloride. Professor said acids should be in the presence of "something"
In an insulated container, a hot piece of iron (cp =0.4513 J/g-C) at 1490. C was added to 200. g of water (cp =4.184 J/g-C) at 20. C. The temperature of the resulting mixture became 90. C. What mass of iron was present?
Calculating effective charges on I and Br, The iodine monobromide molecule, IBr, has a bond length of 2.49 Angstroms and a dipole moment of 1.21 D.
A 7.45-L container holds a mixture of two gases at 35 °C. The partial pressures of gas A and gas B, respectively, are 0.368 atm and 0.852 atm.
If a current of 40 mu A (40x10-6A) is drawn from a solar cell for 6 months, how many faradays are involved
The freezing point of the solution decreases by 0.905 ° C compared to that of the pure solvent. What is the molar mass of the unknown solid. The freezing point depression constant for benzene is 5.46° C/m.
Calculate the mass defect of the helium nucleus 4/2He. The mass of neutral 4/2He is given by Mhe= 4.002603u. Calculate the binding energy of Eb the helium nucleus 4/2He Calculate the binding energy per nucleon of the helium nucleus 4/2He
When 13.0 g of the mixture is dissolved in enough water to make 500. mL of solution, the solution exhibits an osmotic pressure of 6.85 atm at 25°C. Determine the mass percentage of NaCl in the mixture.
draw the mechanism for the reaction between 3-chloroaniline and diethyl ethoxymethylenemalonate.
what is the theoretical yield for the equation
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