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An X-ray photon of wavelength 0.978 nm strikes a surface. The emitted electron has a kinetic energy of 975 eV.
What is the binding energy of the electron in kJ/mol?
[KE = 1/2mv^2; 1 electron volt (eV) = 1.602 x 10^-19]
Calculating concentration of an ion, Given the concentration of hydroxide ions, use the ion product constant of water to calculate the concentration of the other ion at 298 K
Calculate the fraction of methyl isonitrile molecuules that haven an energy of 80.30 kJ or greater at at 450 k.
good primary standard for aqueous acid-base titrations. Calculate the mass, in grams, of KHP needed to produce 250. mL of a 1.50 M solution of KHP.
when 7.00 moles of gas A and 3.00 moles of gas B are combined, the total pressure exerted by the gas mixture is 1.0 atm. What is the partial pressure exerted by gas a in this mixture
what is the animals initial radiation exposure in curies? b) if all of the energy from the emitted alpha particles is absorbed by the animals tissues, and if the energy of each emission
what is the freezing point(Degrees C) of a solution prepared by dissolving 11.3g of Ca(NO3)2 ( formula weight= 164g/mol) in 115g of water?
For each of the following equilibria, use Le Chatelier's principle to predict the direction of reaction when the volume is increased.
Write the reactions responsible for the LIQUID PHASE oxidation of S(IV) to S(VI), and show how the oxidation can lead to a decrease in pH of rain water.
Write a mechanism for the acid-catalyzed transesterification reaction of ethyl acetate with 1-butanol, which gives butyl acetate.
Find the velocity of an electron emitted by a metal whose threshold frequency is 2.15×1014 {rm s^{-1}} when it is exposed to visible light of wavelength 4.76×10-7 {rm m}.
Why do primary alkyl halides typically undergo Sn2 substitution reactions more rapidly than do secondary or teritary alkyl halides?
Draw a bromide that would undergo dehydrobromination (elimination of HBr) under basic conditions to give the compound whose name is below.
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