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Needs a minimum of 216.4 kJ/mol to remove an electron from a potassium metal surface. If UV lights at 227 nm strikes this surface, explain what is the maximum speed (in m/s) of the ejected electrons? (in m/s.)
Microwave ovens use radiation whose wavelength is 12.5 cm.
Explain what is the frequency (Hz) of this radiation? 23.98E8 Hz
Explain what is the energy in kJ/mol of this radiation?
Cooling at constant pressure followed by heating at constant volume. Calculate the initial and final temperature, work (w), heat (q), and the intern energy change (?U) and entalphy change (?H) for each process
what can we conclude about the energy required to excite an electron from n=5 to n=6 versus the energy required to excite an electron from n=4 to 5.
A 36.4 l volume of methane gas is heated from 15 degrees C to 98 degrees C at constant pressure. what is the final volume of the gas?
containing granite basins tend to become acidified by acid rain more readily than lakes lying in calcium carbonate, CaCO3, limestone basins. Explain why?
What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency \rm 1.5\times 10^{15}~Hz
A bottle containing 330 of cleaning solution is used for carpets. If the cleaning solution has a specific gravity of 0.850, what volume of solution was used?
Which protein(s) will bind tightly to CM Sephadex (a cation exchange resin) if loaded onto the column in a sample buffer whose pH is 7.0
calculate the concentrations of all species in a 0.690 m na2so3 sodium sulfite solution. the ionization constants for
What is Kp for the reaction at this temperature? B. For the reaction N2(g)+ 3H2(g) 2NH3(g) Kp = 2.20×10?3 at 268 C . What is K for the reaction at this temperature?
Suppose we have a solution of lead nitrate, Pb(NO3)2(aq). A solution of NaCl(aq) is added slowly until no further precipitation occurs. The precipitate is collected by filtration, dried, and weighed. A total of 16.54 g of PbCl2(s) is obtained from..
a solution of sulphide ct 10-6 m is blended into a 0.4 m sodium chloride solution in a closed container. plot a log
the active ingredient in toothpaste is sodium fluoride an anticavity agent. a 170 g tube of toothpaste lists the
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