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Determine the energy of an electron excited from a hydrogen atom using Bohr's model. Determine the maximum wavelength of energy needed to observe a photoelectric effect for potassium.
If hydrogen atom is excited from an n = 1 state to an n = 3 state, how much energy does this correspond to? Is this absorption or an emission?
Uses of de-Broglie equation in electromagnetic spectra.
Removing an electron from solid potassium requires 222 kj/mol. Would you expect to observe a photoelectric effect for potassium using a photon of blue light (^=485nm)?
Perform the various calculations with your collected data as listed in the lab's observations section and compare your results with the literature values by calculating your percent error for each of the metals.
Calculate kinetic energy of a 2 ton truck lumbering along at 60 mi/hr.
For restriction digestion, how would you dilute the 10X buffer so that it was at the correct concentration (1X) in the reaction solution
Find the temperature and the pressure of a gas inside the cylinder - what was the initial pressure of the gas in the cylinder?
The activation energy for the isomerization of methyl isonitrile (see figure below) is 160 kJ/mol. Calculate the fraction of methyl isonitrile molecules that has an energy of 160.0 kJ or greater at 499 K.
2H+(aq) + 2Br-(aq) + CO2(g) BrO3-(aq) + 5Br-(aq) + 6H+(aq) Rate = k[Br2] Rate = k[BrO3-][Br-][H+]2 (4th order is RARE!) Exp. What is the rate law? What is the value of the rate constant? Why?
The volume of HI(aq) required to reach the equivalence point : (c) The pH at the half-neutralization point. Enter only numbers in your answer. (d) The pH at the equivalence point
When halogens react they tend to gain electrons rather than lose electrons. Pick the best two reasons why this occurs.
sample of a 0.116M potassium sulfate solution is mixed with 38.5mL of a 0.126M lead(II) acetate solution and this precipitation reaction occurs:
Calculate the partial pressure of each, the total pressure and the composition of the liquid solution.
According to the delocalized molecular-orbital theory of metals, in what sense do we say that the entire piece of metal
A Researcher reads directions that call for addition of 25.0 mL of anhydrous ethanol (ethyl alcohol). From among the bottles in the lab, which one should she select
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